diff --git a/day18.1.ml b/day18.1.ml
deleted file mode 100644
index 4e62f91..0000000
--- a/day18.1.ml
+++ /dev/null
@@ -1,90 +0,0 @@
-(* Common util. Should probably put this in a module or something.. *)
-let get_one_line file =
-  try Some (input_line file) with
-    End_of_file -> None
-
-let get_lines file =
-  let rec input lines =
-    match get_one_line file with
-      Some line -> input (line :: lines)
-    | None -> List.rev lines
-  in input []
-
-let read_file file =
-  let channel = open_in(file) in
-  get_lines channel
-
-let explode s = (* convert a string to a list of chars *)
-  let rec exp i l =
-   if i < 0 then l else exp (i - 1) (s.[i] :: l) in
-  exp (String.length s - 1) []
-
-let (<<) f g x = f(g(x))
-let (>>) f g x = g(f(x))
-
-let rec take n l = (* take the first n elements *)
-  match n with
-  | 0 -> []
-  | n ->
-      match l with
-      | [] -> []
-      | x :: xs -> x :: (take (n-1) xs)
-
-let rec drop n l = (* drop the first n elemnts *)
-  match n with
-  | 0 -> l
-  | n -> drop (n-1) @@ List.tl l
-
-let c2i = String.make 1 >> int_of_string
-
-(* --- *)
-
-type exp = Add of exp * exp | Mul of exp * exp | Num of int
-
-let rec string_of_exp = function
-  | Num x -> string_of_int x
-  | Mul (a, b) -> Printf.sprintf "(%s * %s)" (string_of_exp a) (string_of_exp b)
-  | Add (a, b) -> Printf.sprintf "(%s + %s)" (string_of_exp a) (string_of_exp b)
-
-let print_exp = print_string << string_of_exp
-let print_exps = List.iter print_exp
-
-let rec find_matching_paren count (x::xs) =
-  match x with
-  | '(' -> if count = 0 then 0 else 1 + find_matching_paren (count-1) xs
-  | ')' -> 1 + find_matching_paren (count+1) xs
-  | n -> 1 + find_matching_paren count xs
-
-let read_exp line =
-  let line' = line
-    |> explode
-    |> List.filter (fun x -> x != ' ')
-    |> List.rev
-  in
-
-  let rec go stack = function
-    | [] -> List.hd stack
-    | '+' :: xs -> Add (List.hd stack, (go (List.tl stack) xs))
-    | '*' :: xs -> Mul (List.hd stack, (go (List.tl stack) xs))
-    | ')' :: xs ->
-        let matching = 1 + find_matching_paren 0 xs in
-        let sub = take matching xs in
-        let rest = drop matching xs in
-        go ((go [] sub)::stack) rest
-    | '(' :: xs -> List.hd stack
-    | num :: xs -> go ((Num (c2i num)) :: stack) xs
-  in
-
-  go [] line'
-
-let rec eval = function
-  | Num a -> a
-  | Add (a, b) -> (eval a) + (eval b)
-  | Mul (a, b) -> (eval a) * (eval b)
-
-let () =
-  let exps = read_file "day18.txt" |> List.map read_exp in
-
-  let values = List.map eval exps in
-  let sum = List.fold_left (+) 0 values in
-  print_int sum;
diff --git a/day18.2.ml b/day18.2.ml
deleted file mode 100644
index 2217f7e..0000000
--- a/day18.2.ml
+++ /dev/null
@@ -1,106 +0,0 @@
-(* Common util. Should probably put this in a module or something.. *)
-let get_one_line file =
-  try Some (input_line file) with
-    End_of_file -> None
-
-let get_lines file =
-  let rec input lines =
-    match get_one_line file with
-      Some line -> input (line :: lines)
-    | None -> List.rev lines
-  in input []
-
-let read_file file =
-  let channel = open_in(file) in
-  get_lines channel
-
-let explode s = (* convert a string to a list of chars *)
-  let rec exp i l =
-   if i < 0 then l else exp (i - 1) (s.[i] :: l) in
-  exp (String.length s - 1) []
-
-let implode l = String.of_seq (List.to_seq l)
-
-let (<<) f g x = f(g(x))
-let (>>) f g x = g(f(x))
-
-let rec take n l = (* take the first n elements *)
-  match n with
-  | 0 -> []
-  | n ->
-      match l with
-      | [] -> []
-      | x :: xs -> x :: (take (n-1) xs)
-
-let rec drop n l = (* drop the first n elemnts *)
-  match n with
-  | 0 -> l
-  | n -> drop (n-1) @@ List.tl l
-
-let c2i = String.make 1 >> int_of_string
-
-(* --- *)
-
-type exp = Add of exp * exp | Mul of exp * exp | Num of int
-type op = Plus | Mult
-
-let rec string_of_exp = function
-  | Num x -> string_of_int x
-  | Mul (a, b) -> Printf.sprintf "(%s * %s)" (string_of_exp a) (string_of_exp b)
-  | Add (a, b) -> Printf.sprintf "(%s + %s)" (string_of_exp a) (string_of_exp b)
-
-let print_exp = print_string << string_of_exp
-let print_exps = List.iter print_exp
-
-let string_of_op = function | Plus -> "Plus" | Mult -> "Mult"
-let print_op = print_string << string_of_op
-let print_ops = List.iter print_op
-
-let rec find_matching_paren count (x::xs) = (* find matching closing paren *)
-  match x with
-  | ')' -> if count = 0 then 0 else 1 + find_matching_paren (count-1) xs
-  | '(' -> 1 + find_matching_paren (count+1) xs
-  | n -> 1 + find_matching_paren count xs
-
-let rec run_stack exps ops =
-  if List.length exps = 1
-  then List.hd exps
-  else
-    let (l :: r :: exps') = exps in
-    let (op :: ops') = ops in
-    match op with
-    | Plus -> run_stack ((Add (l, r)) :: exps') ops'
-    | Mult -> run_stack ((Mul (l, r)) :: exps') ops'
-
-let read_exp line =
-  let line' = line
-    |> explode
-    |> List.filter (fun x -> x != ' ')
-  in
-
-  let rec go exps ops = function
-    | [] -> run_stack exps ops (* end of our string *)
-    | '*' :: xs -> Mul (run_stack exps ops, go [] [] xs) (* "split" on Mul *)
-    | '+' :: xs -> go exps (Plus :: ops) xs
-    | '(' :: xs ->
-        let matching = 1 + find_matching_paren 0 xs in
-        let sub = take matching xs in
-        let rest = drop matching xs in
-        go ((go [] [] sub)::exps) ops rest
-    | ')' :: xs -> go exps ops xs
-    | num :: xs -> go ((Num (c2i num)) :: exps) ops xs
-  in
-
-  go [] [] line'
-
-let rec eval = function
-  | Num a -> a
-  | Add (a, b) -> (eval a) + (eval b)
-  | Mul (a, b) -> (eval a) * (eval b)
-
-let () =
-  let exps = read_file "day18.txt" |> List.map read_exp in
-
-  let values = List.map eval exps in
-  let sum = List.fold_left (+) 0 values in
-  print_int sum;
diff --git a/day18.txt b/day18.txt
deleted file mode 100644
index a2341bf..0000000
--- a/day18.txt
+++ /dev/null
@@ -1,373 +0,0 @@
-(4 + (2 * 7) * 4) + (6 * 9 + 8 * 4 + 7 * 3) * 3 * 5
-5 * 9 + (5 * 9) * (6 + 2) + 3 + 7
-8 + 5 * 9 * 9 + 9 + 5
-(7 + 9 * 8 + 4 * 6) + 6 * ((9 + 9 + 5 * 7 + 4) * 8 * 2 + 5 * 6 + 2) + 2 * 6
-(6 * (5 + 8 * 7 * 8 + 4) * (7 + 7 * 3 * 5)) + 5 * (8 + (8 + 3 + 5 + 5) + (3 + 2 + 7 * 2 * 9) + 6 * 5 + (2 * 6)) * ((4 * 3) + 3) + 9 * (3 + 6 * 2 + 3 * 8)
-2 * 9 + (6 * 2 + 6 + (9 + 6 + 8 + 5 + 5) + (8 + 7 * 4 + 3) + 8) * (4 + 4 * 2 + 6)
-5 + 4 + 5 + (7 + (9 + 7 + 4 + 4 + 4 + 5) + 2 * 4) + 4 * 9
-9 + (7 * 8 + (6 + 3 + 4)) + (5 * 9)
-2 * 4 + 8 + (5 + 8) * 9 * (9 + (5 + 3) + 3)
-8 * 6 * 5 + 8 + (8 * (2 + 8 * 7 * 5 + 3 + 5)) * 2
-6 * ((3 + 4 * 3 * 7 * 8) * 8 + (9 + 5 + 2 * 3) * 3 * 2) + 7 + 8 * 8 + 4
-9 + 3 + 7 * 8
-(9 + (4 + 9 + 3 + 5 * 5 + 5) * 5 + 9 * 6) * 3 * 2 * 6 * 5
-7 * 9 * 6
-(5 + 2 * 8) * 8 + 3 + 8
-9 * 5 * (5 + (5 * 4 + 8 + 6 * 5) * (9 * 7 + 5)) * 3 * 9
-(6 * (8 * 3 * 7 + 2) * (3 + 9 + 5 + 5) + 3) + 7 * 3
-7 + 9 + (4 + 9 * (4 * 6 + 3 * 8 * 5) + 8 + 9 + 3) + 6 * (6 + 8 + 7 * 9 * 6 + 6) + 7
-2 * (5 * 5 + 6 + (5 + 5 * 5 + 6)) * 4 + 5 + 2
-8 + 2 * (8 * 7 * 4 + 8) * 9
-9 + 5 * (4 * 8 + 9 * 6 + (3 * 3) + 2) + 5 + (4 * 5 + 2 * 2)
-(5 * 7 + 2) + 3 + 9
-7 * 9 + 8
-3 * 7 * (7 + 5 + 8 * 5 * 8)
-(7 + (3 * 6 + 6 * 9 + 2) * 8 * 6 + 6 + 2) * 6
-4 * (7 * 5 * (6 + 8) * 7 * (5 * 3 * 2 * 9 + 2 * 4) * 6) * 2 + 2 * 5
-((3 * 3 * 9 + 8) + 2 + 5 + 8) + 6 * (6 + 9 * 2) + 7 * 9 * ((9 + 4 + 4) * 4 + 4 + 9)
-7 * (4 * 2 + 3 + 7 + 5) * (8 + 2 + (5 * 9) * 2 + 3 * 5)
-7 + (8 + 3 + 8 * 4 * 2 * 2) + 7 * 2 + ((3 + 5 * 3 + 5) * 8 + 3) + 8
-7 + 2 + 9 * 9 + 5
-((6 + 4 + 2) * 2 + 9) + 3 * 6 * (6 + 4 + 9 + 2 + 6) * 9
-6 + 6 * (9 * 9 + 6 + 6) + 2 * 6
-2 + 5 * ((4 * 4) * 6) + (3 * 3 + 2) * 9 + 5
-9 * 4 + 8 * 5 * ((6 * 5 * 4) + (3 + 8 * 7 + 6 * 7) * (6 * 6 + 7) * 8 + 4 + 7)
-3 * 8 + (4 + (7 * 7 + 9 * 8 * 6 + 7) * (8 * 4 + 4 * 6 * 4 + 4) + 2 * 9)
-3 + 6 * 2 * 3 * (4 + 7 + (3 * 6 + 7 * 8) * 7 + 9 * 8)
-2 + 8 + (5 * 4 * 2 * 5 + 5) * 4 + 3 * 4
-6 + 4 + (5 + 5)
-6 * 3 + 8 + (8 + 2 + 9 * 3) * ((6 * 8 + 6) + 6 + (7 * 4 * 3) * 4 + 9 + 3)
-((9 + 7 + 9 + 2 * 7 * 7) + 8 * 6) + 2 + 7
-6 * (6 + 9 * 2 + 4 * 7 + 8) + 5 * 9
-((2 + 5 + 6 * 3) + 7 + (7 * 6 * 8 * 3 + 8 * 3)) + (8 * 6 * 8 * 9 * 5)
-6 * 7 * 5 + 5 * (2 * 9) * 4
-(8 * 7) * (2 * (7 + 3) + 3) + 8
-(7 * 9 + 7 + 7 + 7 + 7) + (7 * 5 * 8 + 4 * 5) + 6
-5 * (6 * 7 * 8 * 5) * 6
-5 * (2 + (6 * 7) * 8 * 3 + 6 * 2) + 2 * 4 + 8 + 3
-3 * 5 + 6 + 6
-((9 * 9) * 6) + (4 + 9 * 6 + 4 * 9 + 7)
-(3 + 9 + 2) * (3 * 7 * 7 * 7 * (8 * 8 * 4 + 3 + 8)) + 2
-6 * 6 + 8
-((9 + 5 + 8) + 9) + 7 + ((9 * 5) * 3 * (3 * 4 * 4 + 3) * 7) + ((5 + 6 + 2) * (7 * 2 * 9 * 8) * 5)
-6 + (8 * 7 * 6 + 5) + 9 * 7 * 7 * 7
-2 + (4 * 9 * 3 * 9 + 8) + 2 * 7 * 3 + 4
-7 + 3 + (5 + 7 * (4 + 4 * 8) + 2 + 8 * 6) * 2
-(2 * 5 * (4 * 7) * 9 * (3 + 7)) + 3 * 4 * (2 * 3 * 8 * 4) * ((6 + 2 * 2) + (6 * 5 * 7 * 6) + 9 * (8 + 4))
-((9 + 3 + 5) + 8) * 2
-2 + 4 + 7 + 5 * (6 * 7 + 8 * (4 * 3 + 6 * 4 + 7) * (7 + 3 + 7 + 3 * 2) + 8)
-5 + (9 * 8 + 5)
-(2 + (9 + 7 * 8) + (6 + 7) + 6) * 5 + 3 * 2
-7 + (9 + (8 * 7 * 9)) * 8 + 3
-9 * (9 + 4 * 2 * 3 + (6 + 7 * 8 + 9)) + 6 * ((7 * 4 + 7 * 4) + 2 * 6 * 5 + 6 * 6)
-((3 * 3 + 4 * 9) + 7 + 7 + 3) * 8
-9 + 8 * (2 + 6 + 8 * 6 + 3 + (8 * 6 * 6 * 4 * 6))
-3 * (9 + 2 * (9 + 2 * 8) + 3 + 8 * 5) + (9 + 8 + (6 * 9 + 2 + 8 * 5 + 7) * 7) * 2
-((2 + 9) + 3) * 6 * 2 * 2 * 4 + 7
-2 * 3 + 4 + (7 + (7 * 5 * 5 + 5) * 9 + (3 + 3 * 5) + 3 * 8)
-4 * (8 + 2 + (3 * 7 + 4 + 2 * 6 + 2) * 8 + 7)
-4 + (5 * 9 * (8 + 3 * 9 + 9 + 5) * (3 * 8 + 9 * 8)) * 8 + 9
-4 * 5 * (2 + 2 + 7 + (3 * 7 * 4 * 2) + 3) * 6
-((8 * 8 * 4 + 4 + 5) + 6) + 9 * (3 * 3) * 4
-9 * (8 + (6 + 2 * 7 + 3 + 8 * 8) * 3 * (9 + 3) * (3 + 7 * 3) + 5)
-9 * 3
-6 * (7 + 8 * 8 * 4) * 6 * 9 + (4 * 7) * 4
-4 * (3 * (4 * 9 * 6) + 5 + 5) * 4 * 6 * 6 * ((9 + 3 * 6 + 5 + 8) + 4)
-5 * 2 * (4 * 3 + (8 * 4 + 2 + 2) * 6 * (8 * 8 * 2 + 7 + 9) + 3) * 5 + (4 + 6)
-3 + (5 + 6 * 5 * 9) * 9 + 7
-((3 + 6 + 8) * 7 * 3 + 4 + 4 * 8) * 2 * 2
-2 + ((9 + 9 * 4 + 2 + 3) * 4 + 9 + 5 + (7 + 3 * 9)) + 8 + 7 * 3
-5 * 5 * (5 * 6 * 6 + (3 + 4 * 8 + 7) * 2) * 6 + 4 + 3
-4 + 3 * (5 + (6 * 5 + 6 * 2) * 4) + 9 + 7 * (5 * 5 + 9 * 5)
-2 + (6 * 7) + 7 + 3 * 7
-5 * 7 * (6 + (9 * 5)) * 4 + 2
-((7 * 7 * 3) + 2 + 2 + (9 + 8 + 3)) * (3 * 8 + 6) + ((6 + 2 * 6) * (2 * 4 + 3 + 8 + 2)) * 8
-((8 + 3 + 8 + 5 + 8 * 3) * 2 + 4 * (6 + 4)) * 8 * 2 * 5 + 9
-7 + 6 * 3 + 3 + (5 * 7 + 3 + 3 + 8) * 6
-8 + 7 + ((5 * 9 * 3 + 3 + 4 + 6) + (6 * 6 + 2 + 6) + 8)
-5 + 5
-6 + (6 * 5 * 7 + 8)
-(8 + (9 + 2 + 8 + 2 + 2) * 4 + 7 * 6) * 9 * 6 * (6 * 6 * 5 + 5 * 4) + 7 + 9
-3 + 8 + (3 + (6 * 9 + 9 * 2 * 3 * 4) * 3 + 9 * (4 * 2) + (3 * 2 * 9 + 2))
-(5 * 8 + 7 * 8 + (2 + 3 * 8) * (8 + 4 * 7)) * 3
-8 + 2 * (2 + (6 * 6 + 9 * 3 + 6) + (9 * 2 * 4) + 6 * 4 * (6 * 3 + 2 + 6 + 3 + 5)) + 8 + 4 * 9
-8 + 8 + (4 * 9 + 9)
-5 + 5 * (5 + 8 + (3 * 9 * 9 + 8 + 8 * 2) * 5) * (8 + 7 + 7 + 8 + (2 + 7 * 4 * 8))
-6 * 3 + 6 + ((9 * 5 * 4 + 6 + 5 + 5) * 6) * 2 + (6 * 5 + 5 * 7 * 8 * (3 + 7 * 7 * 9))
-4 + (3 + 4 + 5 * (4 * 2 + 7 * 9 + 6 + 6)) + (7 + 7)
-2 * (6 + 2 + 6 * 3 + 4) + (6 + 5 * 4 * 8 + 3 + 7) + 8 + 3 * 5
-((5 + 3 + 7 * 2 + 9 * 5) + 7 * 7 * (4 + 7 + 9) + 8 + 6) + 3
-((9 * 9 + 2 * 7 * 5 * 6) + 8 * 7 * 4 * 2 + 6) * 5 * 9
-((3 * 3 * 2 + 5 + 6) * 7 + (3 * 6 * 2) * 3 + 3) + 9 * 7 + 5
-(7 + (4 + 7 + 6 * 8 + 9 * 9) + 7 * 2 * 2) * 7
-(9 * 3 * 9) + ((2 * 6 * 6 + 9 * 7) * 3) + 3 + 8 + 8
-2 + (3 * 5) * (2 + 8 + 8 * 3 * 6 + 6) * 6 * 9
-(4 * 7 * 7 + 3 + 4) * 3 * 9 + 6 * (2 + 5 * 4)
-(8 * 4 + 3 * 8) * 4 * 5
-(7 + 5 + (4 + 2) + 4) + (2 * 5 * 9 * 2 * 6)
-9 * 4 + 3 + 8 * (2 * 4 + 7 * 2 * 2) * (2 + 6 + 5 + 9 + 5)
-8 + 3 * (6 * 8) + (2 * 4 + 7 * 8)
-(9 + 6 + 3) * 5 + (9 * 8) * 5 + 6 * 5
-((6 * 2 + 6 * 2) + 3 + 7 + 5 * 8) * 2 + 2
-2 + (9 * 3 * 9) * (4 + (6 + 4 + 7) + 5) + 9
-(3 + 4) + 5 + 7 + 7
-9 + 8 + 8 + 7 + 5 + ((2 + 7 * 9 * 7 * 6 * 9) * 8 * 8 + 7 * 3 + 9)
-(8 * 7 * (8 * 7)) * 9 + (4 * (4 + 9) * (7 * 9 + 9 + 6 * 5 + 5) + 7)
-(6 + 7 * 9 + 5 + 5) * 5 * (2 + 6 + (3 * 6) + (7 + 3 + 5 * 5) + 9)
-2 + ((7 + 8 * 2 + 8) * 4 + 2) * 9 * 9 + 8
-8 * 8 * 7 * 2 + 2
-7 * 2 + 9 + ((5 * 2 + 6 * 9 + 8 + 7) + 6 * 2 + 8 + 4 * (3 * 2 * 3 * 2))
-5 * (7 * 5 + (7 * 9) * 4 * 6 * (8 + 7 + 3 + 9 + 9)) * 4
-8 * ((3 + 7 + 5) + 7) + 5 + (6 + 4 + 6 + 4 * 4) + ((2 * 6) * 3) + 9
-3 * 3
-4 * (5 + 5 + 6 + 2 + 7) + 7 * 6
-(7 + 4 + 5 * 9 + 5 + 8) * 8 * (7 * 9 * 9) + 4
-3 + (9 * (7 * 7 + 3 * 4 + 8 + 5) * 7 * (2 * 4) + 9 + 5) * (4 + 7)
-6 * (5 * (6 * 2) + 6 + (4 * 8 + 9) + 3 * (2 * 4 + 4)) * 6 * 5 + 6 + 3
-(9 * 3 * 9) * 8 * 5 * (8 + 3 + 2 + 9)
-(8 + 8 * (8 * 9) + 2 + 7) + 8 * (5 * 7 + 6 + 2 * 4 * 2) + 6 * (3 * 8 + 6) * 2
-2 * (8 * 5 + 7) * 8 + 7 * 9
-4 * 4 * (5 + (5 * 4 + 2 * 9 + 5 + 7)) * 8 * ((4 * 9 + 4) + 6 * (7 + 2 + 4 * 8 * 9))
-4 * 6 + (4 * 8 * 3 * (9 + 8) * 7 * 9)
-(6 + 9 + 3 * 2 + 8 * 8) * 6
-(8 + (3 + 3 + 2 * 3) + (6 + 7 * 6) + 7 * 4 + (9 * 5 * 4 * 6 + 2)) * 2 + 5
-4 * 6 + 2 * 5 * 2 + (5 + 3 + 2 + (5 * 3 * 3 + 7 * 6 + 2) + 8)
-9 + 2 + (7 * 7 + 7 + 9)
-5 + 8 + (8 + (5 + 9 + 6 * 2 * 4 * 4)) * 9
-(2 + 4 + 8 + 7 * 8 * 5) + 3 + 3 + (9 + 9 + (9 * 2 + 6 + 4 + 4) + 6 * 2) + 2
-7 + (6 + 5 * 2 * 9 + 7 + (9 + 7)) * (3 + 6 + 2 * 5 * 3)
-8 + (9 + (4 * 3 * 7 * 7) * 7) + 9 * 6
-6 * 9 * ((8 + 5) + 9) * 7 * 8
-(2 * 9 + 2) + (6 * 3 * 3 + 6 * 7 + 9)
-7 * 5 * (4 * 4 + 7 * 4 + 8 + 3)
-3 * (6 + (5 + 3) + 5) * 3
-(7 * (9 * 5 * 9 + 2 + 4) + 3 * 8 + (9 + 7) + (2 * 9 + 5)) * (6 + 3 * 9 + 3 + (7 + 4 * 9 + 5) + 9) * (8 * 2 + (2 * 9 + 7 + 5 * 4) * 4)
-4 + 7 + 5 + 6 * 8
-5 + 4 + 3
-9 * (6 * 2 + 7 + 5) * 3 * 2 * 2
-7 * 4 + ((6 * 7 * 6 * 8 + 6 * 9) * 7 * 3) + 8
-9 * 5 + 4 + 8 + 8 * 8
-(3 + 6) * 2 * 7 * (2 * 7 + 2 + 6 + 3)
-5 * 2 + 8 * 7 + (4 + 8 + (3 * 6 + 7 * 2 + 4 + 7))
-6 + (8 + 6 * (9 * 7 + 2 + 2 + 3 + 4) * (4 * 7 + 2 + 4 * 3) * 3)
-(8 + 5 * 2) * (9 * 4) + 5
-3 * (4 * 5 * (4 + 3 + 4) + 5 * (3 + 6 + 3 * 7 * 7)) * 3
-2 + 7 + (8 + 3) + 8
-8 * (9 * 8 * 3) + 4
-(2 * 6) * 3
-((9 * 6 + 3 + 3 * 9 + 7) + 2 * (2 + 9 * 8 + 2 * 4) + 9 * 8 + 6) + (5 * 9 * (2 + 7) + 7 * 9) + 7
-4 + 7 * ((3 * 7 + 2) * 9 * 7 * 2 + 4 + 3) * 4 * (3 + 8 * 9) + 6
-9 * (9 + (9 * 6 + 2 * 7 + 6) + 7 * 2 + 2)
-(9 * 2 + 4 + 8 + 6 * 8) * (4 + 8 + 7) * 5 + (4 * 2 + 2) * ((4 * 5) * 8) * 2
-(5 * 9 + 9 + 2) * 3 + ((7 * 5 + 9 * 3) + 2 + 3 + 6 + 7) + 4 * 6 * 6
-9 * 8 + 3 * 4 * (9 + 5 + 7 + 5) * (6 * (7 + 4 * 6 * 7) + 6 * (6 * 5 * 3 + 9 + 4) + (2 * 3 + 3 + 6))
-7 * 6 * 2 + (8 * 9 + (6 * 7 * 8 + 6 + 9 * 8) * 3 + 6)
-5 + 7 * 8 + 2 + ((2 + 4) * 7)
-2 * 5 + 6 * 6 * (3 * 6)
-6 * 6 * 6 * (6 * (4 * 4 + 5) * 4 + 3 + 9) + 4
-((3 * 4 * 7) * 5 * 9 + 7 * 6 + 5) + 2 * 2 * 6 + 4 * 8
-7 * 2 * (3 + (6 * 9 * 9) * 4) * (5 * 8 * 7 * 6 + 2 * 9) * 7
-9 + (6 + 6 + (8 + 8 * 3 + 6 + 6))
-5 * 2 + 7 + 3 * (9 + 9 * 9 * 9 * (4 * 4)) * 2
-4 + 6 + 3 + (2 + 2 * 7 * 2) + 5 + 7
-7 * 9 * 9 * 2 * 4 + 7
-6 + (6 + 5 + 5) + 7 + 4
-9 + (9 * (7 * 3 + 9 + 7 + 8 * 8) * 6 * 5) + 2 * 5
-8 + 6 * 8
-8 * (9 * 6 + 4 + 8 + 8)
-((8 + 3) + 8 * 2) + (3 * 6 * 7 + 7 + 4 + 2) * 9 * 5
-6 * (4 * 5 + 6 * 7 * 4) + (2 * 8 + 4 + 7 + 7 + 6) + 9 + 5
-9 * 8 * (2 + 7 + 9 + 4 + 5) + (8 * (3 * 8 + 3 * 6)) + ((7 * 2) * 7) + 2
-9 + 4 + 9 * 2 * (5 * 2 + 6 + (9 * 5 + 8 + 2 * 5) + 6 + 6) + 7
-9 + 9 * ((3 * 6) + (5 + 5 + 7 * 9 * 4 + 9) + 2 * 6 * 6) * 5
-(9 * (3 * 2) + 8 * 2) * (6 * (8 + 3 * 8 + 5 * 5 * 9) + 4 + 9 * 6) * 5 + 9 * 6
-7 * 9 * (2 * 9 + 4 * (3 * 2 * 6 * 9 + 5 + 6) + 2) + 7 * 6 + 3
-9 + (5 * (3 * 9) + 4 * 6 + 6) + 9 + 8 * 5
-8 + 8 * 8 + (9 + 4 * (5 + 3 * 8 * 3 * 4 * 4) + 2 * 8 * (9 * 6 * 4 * 6 + 9))
-(6 + 6 * 3 + (5 + 8 * 4 + 4) + 3) * (3 + 7) * (6 + 5 * 4 * 6 + 6 + (5 * 7))
-(9 + 7 + 6 + (8 * 8) * 4 * 6) + 3 * 5
-5 * 2 * 3 + (3 + (6 + 9 * 2) * 3 * 3)
-2 + (8 * 7 * (4 * 8 * 2 + 6 * 7)) * 5 + 5 + (8 * 5)
-9 * 6 * 4 * 2 * ((6 * 3 + 9 * 8) * 5) * 3
-((8 + 6) + 6 * (8 * 5 * 5 * 7) + (2 + 9 + 6 * 7) * 7 * (2 + 9 * 7 * 3)) * ((7 * 5 + 2 * 5) + (8 * 7))
-(7 + 8) * 6 * 9 + 6 + 6 * 8
-7 * 8 + (8 * 2) * 7 * 8 * 9
-9 * ((8 + 6 * 9 + 2 + 3 * 2) * 2 + 4 + 3 + 7) * 2 * 6
-2 + (8 + (2 + 9) * 7 * 4 + (8 * 6 + 8 * 6 * 4 + 5) + 6) + 4 * (9 + (3 + 4) * (3 * 9 * 7 * 6 + 9 + 7) + 9 * 6 * 3)
-2 + (8 + (8 * 2 + 3 * 8 * 4 + 2)) + 3 * 6
-(5 * 5 + (3 + 5 * 6 * 9 + 4 * 4)) * 8 * (7 * 7 + 3 * 7)
-9 + 6 * (9 * 2 + 2 * (9 + 6 * 8 + 5 + 3))
-5 * 5 + 5 * (7 * 3 * 3 * 5) + 6
-7 * 5 * 7 * ((6 * 3 + 5 * 8 * 6) * 7 + 4 * 5) + 7
-(5 * 4 + 8) * 3 + 6 + 9 + 6
-(7 + 7 + 4 + 8) * (2 * 7 + 9) * 2 * 4
-2 + ((7 + 2 + 9 * 4 + 2) * 6 + 9)
-9 + 2 + (7 + 6 + 4) * 3 * 8
-5 + 7 * 2 + 2 * (3 * 4 + 4 * 6) + 2
-2 + (7 + 2 + (9 * 3 * 5 + 7 + 7) + 5 * (7 + 7 * 2 * 4 * 7 * 4) + 5) * (6 + 2 * 5 + (4 * 6 + 4 * 8 * 4) + 7) * 2 * 5
-((5 * 9) * 9) * 2 + 4 + ((3 + 6) + (9 + 3 + 6 + 3) * 3 * 5 + (9 + 9 + 6 * 7) + 7) * 2 + 9
-4 + (4 + 4 + 6) + 6 + 5 * 9 + 8
-(3 * 8 * (7 * 5 * 7 * 5 * 7 + 2)) * 7 * 4 + 3 + 2 + 4
-(4 * 8 + 7 + 8 * 5 * 9) + 2 * (5 * 2 * 3 * 9) + 7 + 7 * 2
-6 * 3 * (4 + 6) + 7 + 2
-(5 + 4 + 4 * 8 + (4 * 6 * 5 + 7 * 4 * 2)) * 9 * 6 * 6 * (3 + 5 + 9 * 7)
-4 * (5 * 2 + 8 * 9 * 3) + 3
-7 * 3 + 7 + 5 + ((6 * 8 * 8 + 8 + 2 * 4) * 8 * 2 * 9)
-4 * 2 + 6 + 2
-(2 * 2 + 2 * 9 * 6) + (5 + 9) * 3 * 9 * 5
-(5 + 5 * (3 + 3 + 7) * (3 * 7 * 7)) + 4
-9 + 7 + 9 + 5 * 6
-(6 + 9 + (4 + 7 * 7 * 4) + (9 * 2 + 9 + 5 + 6)) + 7 * 8
-5 + (5 * (6 * 5 + 8 + 2) + (4 * 7 * 4 * 7 * 7 * 8) * 8)
-4 + (6 + 6 * 2 + 9) + 7 * ((3 + 8) * (3 * 5 + 5 * 3 * 3 * 6) + (4 + 9 * 3 + 3 * 2 + 9))
-(7 * (7 + 7 + 5) * 8 * 2 * 8 + 3) + (2 * 4 + 8 * 7 + 3 + 2) + 7 * (7 + 2 + 2)
-(3 * 7 * 4) * 5 + 4 * 7 * 8 * 4
-7 * 3 * (2 * 7 * 9 * 7 * (8 + 4 + 2) * 3) + 7
-7 * (9 + 2 + 5 + 5 + 7 * 5)
-5 + 2 * 9 * (8 * 6 * 8 + 2 * 7)
-4 + (2 + (2 * 5 * 7 * 5) + 3 + 6) + 8 * ((3 + 4 * 4 + 5 * 3 + 6) + 2 + (5 * 8)) + 8 + 3
-2 * (9 * 7 * 3) + (8 + 7 + 8 + 2 * 3 + 9) + 8 + 9
-8 * (7 + 5 * 3 + (2 * 6 * 6 * 4) + 9) + 3 * 4
-3 + 4 * 8 * 9 + (6 + (5 + 7 * 7 * 4)) + 7
-(5 + 6 + 8 + 5 * 7) * 2 + 5 * (9 * (9 * 9 + 8 + 5) + 7 * 4)
-8 + (8 * 2 * 4 * 2 + 3 * 2) * (3 * 3) * 6 + 8
-(6 * 2 * (6 + 5 * 9 * 3) * 6 * 2 + 7) + 7 * 8 + 2 * 4
-5 + (2 + 4 + 5 * 4 + 6) + 9 * (5 * (5 + 9) * 9 * 9 * 2 + 8) * 5
-7 * 4 + 9 * (9 + (5 * 7 + 8 * 7 * 5) + 9 + 2 + 2 + (2 * 4 * 7 + 5))
-7 + 2 + (4 + (8 + 8 + 5 * 9)) + 9
-(8 * 3 * 9 + 6) * 8 + 8 + 7
-(2 + 3 * 9 * 4) * 7 + (8 * 6 * 9) * (8 + 6 + 9 + 4)
-((7 * 6 + 4) + 6 + 6) + 5 * 4 + 3 * 4
-5 * (2 + (3 * 9 + 9 * 6) + (7 + 3 + 2 * 4 + 9)) + 7 + 8 * 5 * 5
-7 * 9 * (5 + 6 + (7 * 6) + 4 + 4 + 3) * 2 + 9
-(3 * 2 + 5) * 8 * (2 + 4 + 2 + 8 + 7 * (8 * 9))
-((2 + 7 * 8 * 9) * 4 * 3 + 6 * 7) + 9 * 8 + 5 + 9
-5 + 4 + 9 + 8
-7 + 7 + 9 + 2 + 5 + ((6 * 3 + 3 + 6) * 4 * (4 + 4))
-(9 * 4) + 8 * 4
-3 * 9 * (9 + 5 * 4) + 8 + 9 * 3
-3 + (9 * 8 * (6 + 4 + 6 + 5 * 2) + 9 + (4 * 7 * 7) + (3 + 4 + 6 * 8 + 9)) * (2 + 8) + 7 * 5 * 6
-9 + 6
-6 * 8 * 8 + 6 * 6 * ((9 + 3) + (4 + 2 * 8 + 8 * 2 + 5) * 2)
-4 + (4 * (2 + 2)) + 7 + 4 + (4 * (8 + 8 + 4 + 4 + 2) + (3 + 2) * 9 + 8) + (4 + 9 * 9)
-(2 * (3 * 7 + 6 + 2)) + (4 * 6) + 6 + (6 + 9 + (2 * 2 * 2 + 6 + 4) * 4) * 5 + (4 + 2 * 5 * 8 + 6 * 2)
-4 * ((5 + 5 + 9 + 3 * 5) * 7 * (7 + 9 * 5 * 7 + 2) + 5 * (4 + 7)) + 7 * 9 * 6 * 4
-4 * 7 + 4 + ((4 + 8 * 6 * 3 + 2) + 3 + 8 * (6 * 7 * 2 * 8) * 7) * 9 + 6
-4 * 6 * ((3 * 6) + 4 + (2 * 2 * 2 * 7) + 9 + 8) * (3 + 8 * 2 * 4 * 2 * 3) + (4 + 3 * (7 + 5) + 6 + 9) + 5
-(7 + 2 + (8 + 6 * 4)) + 8 + (7 + 5 + (2 * 5 + 9) * 5)
-(7 * 8 + 5 + 8 + 8 * 2) * 6 + (5 + (8 + 3 + 4 * 5) * 9)
-8 * (4 + 5 * 9 + 6 + 8 * 7) * 3 * 6 + 4 * 5
-6 + ((6 * 3 * 4) + (8 * 8 * 2 * 5 * 8 + 2)) + 3
-9 * 3 + 6 + 5 + ((5 * 2 + 9 * 5 + 6) + (4 * 9)) + (4 * 2 * 3 + 7)
-6 + 8 + (6 + 2 + 8 + 2) * (5 + 8 + 5 * 5 + (4 + 9 + 3))
-(2 * 7) + (6 + 4 + (8 + 6 + 5 + 9 * 4 + 7))
-8 * 3 + 3 * (3 * 5) * 6 + 2
-9 + 4 + ((5 * 4 + 2 + 6) + 5) * 5 + 6 + 4
-(9 * 9 * 3 + 5 * 3 * 4) * 3 + (2 + 3 * 5 + (3 + 6 * 6 + 2) * 8 + 3)
-(6 + 9 * 9 + 7 * 6) + 7
-4 + 6 * (3 * 3 * 7 * 7 * 5 + 2) * (7 + 7 * 2 * 5 + 4 + 9) + (8 * 2 + (8 + 8 * 4 + 7 + 3 + 5) * 7) + 9
-4 + 8 + 6 * 7 * 7 + (2 * 8 + 3 + 5)
-4 * 8 * 4 * (9 * 9 * 5) + 9
-8 * 5 + (2 + 3 + 2 + 8 * (3 + 5 + 8 + 7 * 9))
-3 * ((8 * 6 + 9 * 8 * 5) + 9 * 6 + 6) * 6
-5 * 8 + 6 * (5 * 2 * 8)
-8 + (6 + 7 + 7 * (6 + 7 + 3) * (5 + 2 * 7) + 7) + (2 * 8)
-6 + 5 + 4 + 2 + ((3 + 8) * (5 + 4 * 9) * (4 + 9 + 3 + 9 + 9 * 7) + (5 + 2 + 9 + 3) + (6 + 6) + 3)
-3 * (2 + 5 * (5 * 6 * 5 + 9) + 9 * 5) * 8 * 5 + 4
-2 * 4 + 6 + (9 * 4 * 3 * 4)
-(4 * 6 * (3 + 9) + (3 * 5 + 8 * 5 * 9) + 6) + 9 + 8
-(3 * 5 + 8) + 8 * 8 * 7 + 8 * (9 + 6)
-(5 * 4 * 6 + 3 + 3) * (3 * 8 * (7 + 2 * 9 * 6)) + ((9 * 9 * 4 + 8 * 7 * 7) + 4 * 4) + 8 * 6
-3 + 5 * 5 * 6 * ((3 + 3) * 8 + (6 + 9 + 2 + 6 * 7)) * 4
-9 + ((4 * 7 + 2 + 2 * 6) + 8 * (4 * 6 + 7 * 5) * 7 + 4) + 6 + 6
-(9 + 9 * (8 * 2 + 9 + 5) * 3 * 4 * 4) + 5 * ((3 + 6 * 3 * 7) + 6 * 4) * (3 + 8 * 9 + 6 + (4 + 3 * 4 + 2) + 6)
-5 * 5 * (9 + 8 * 3 * 3 + 3) * 4 + 8
-3 + (6 * 9 * 8) + 9 + (3 + 3 + 2 + 5 + 2)
-3 + 4 * (4 * 8 + 2 * (3 + 3 + 4 + 9 * 7) + 4 + (6 + 9 + 4 * 6 + 9))
-6 * 5 * 9 * ((6 + 9 * 6 + 7) + (6 * 4 + 2 * 4 * 6 * 6) + 9 + 6 + 8)
-7 + 7 * 2 * 4 + 7 * 2
-2 + 8 * (7 + 3 * 3 + 2) + 6 + 3 * 7
-2 * 2 * 9 + 8 + 8
-9 + 5 + 4 * (6 * 7 * 5 * 7 * 4 * 3) * 3
-7 * 5 * 7 * 6 + 4 * 9
-((9 + 7 + 9 + 7 * 7 * 4) * 6 * 5) + 5 + (8 + (2 + 6 * 9 * 7 * 9 + 9) * (9 * 3 * 8 + 9 * 6 * 2) + 6 * 7) * (2 + 6 + (3 * 4 + 4) * 6 * 5) * 9 * 5
-(7 * 5 * (3 + 2 + 6 * 5 + 9) + 5 + (2 + 9) + 2) + 2 * 6 + (5 * (7 * 2 + 3 + 8 * 9) * 7 + 6 + 6 * (5 + 3 + 9)) * (4 * 6 + (9 + 7 + 4))
-((3 + 5) + 7 + 3) + 6
-3 * 4 + 4 * 6 + (5 + 8 * 2)
-7 + (7 * (4 + 4)) * 3 + 7 * 4
-(5 + 4 * 6 + 3 * 9 + 7) * (7 * 3 * 5) + 6
-3 + 4 * (8 + 2) + ((6 * 7) + 8 + 8 * (9 * 3 + 2) * 9)
-7 + (7 + 9 * 2 * 9 * 2 * (2 + 5 + 9 * 6)) * 4
-(7 + 6 + 3 + 5 * 2) + 2 * 3 + 4 * (3 + 4 * 5 * (3 + 7) + (7 + 2 * 7 * 6) + 8) * 8
-4 + (9 * 2 * 6 * (6 + 6 * 7 * 7 + 5) * 9) * 9 + (4 + 8 * 7) * 4 + 4
-6 * 6 * 2 + (4 * 2 + 7 + 4 + (2 + 2 * 5)) + 2
-8 + 2 + 3 + 3 + 8 + (6 + 4)
-8 + 9 + 2 + ((3 * 9 * 3 * 5) * 3 + (2 + 2 + 8 + 6 + 9 + 7)) + 9
-6 * (3 * (5 * 4 + 4 * 4 * 4 + 4)) * 8 * (5 + (5 + 2 * 7 + 8) * 3)
-3 + ((3 + 7) + 2 + (5 * 3 + 4 * 9))
-4 + 5 * 6 * (7 * 5 + 6 * 5 * 5 + (4 * 6 * 9 * 6)) + 7 + 3
-7 * 4 * 7 * 5 * (3 + (5 + 6 + 9 * 9 * 3 * 7) * 2 * 8 + 2 + 6)
-5 * 4 + (4 * 7 * (3 + 8 + 9)) + 4
-(7 + (3 * 5 * 7 + 5 * 8) * (6 + 9 * 6 * 7) * (3 + 9 * 8 + 4) + 8 + 7) * 2 + 4
-8 + 7 + (9 + 6 + 7 + 9 + 6 + 4) + (7 * 8 * 6 * 5 * 3) + (3 * 4 * 3 * 8)
-7 * ((4 + 4 + 9 + 3 * 3) + (9 * 6 * 8 * 7 * 3 + 6) * 7 + (7 + 2 * 3 + 6 * 2)) + 3 + (5 * 8) + (4 + 9 * 6 * (2 * 5 + 7 * 3 * 5) * 3 * 8)
-8 + (3 + (8 + 3 * 4 + 4)) * 2 * 4 * (3 + 4)
-(4 + 9 + 4 + (4 + 7 * 3 * 2 * 5 + 7)) * 2
-2 * 8
-6 * (7 * 5 + (4 * 5 * 2))
-(3 + 3 * 4 * 3 + 7 + 4) + 8 + 2 + 4 * 4 * 5
-7 * 2 * 5 + (2 * (9 + 6) * (3 * 8 + 4) + 3) * 9
-(6 * 9 * (6 + 6 + 7 + 7) * (5 * 7 + 8 * 5 + 2 * 8) + 5 + 8) * 9 * 9 + 3 * 2 + 7
-(2 * 3 + 8 + (4 * 2 + 7 * 2 + 7 + 7) + 3 + 6) * 3 * (6 + (9 + 7 * 2 + 2) + 6) + (4 + 3) * 3
-4 * (6 * (8 * 8 + 7) + 7) * 6 * 9 * (4 * (6 * 4 * 3 * 2 + 6) + (8 * 9) + (9 + 3) * 4)
-5 * 7 * 2 * (2 * 2 * 5 * (8 + 6))
-(8 * (7 + 7 + 8)) + 2 + 9 * 9 + 9 * 4
-6 + 6 + 5 + (2 * (8 * 7 + 3 * 6) + 9) * 7 + 6
-8 + 6 + (8 * 4 * 8 * 2 + (6 * 6 + 9 * 3 + 6)) + 3
-9 * 5 * 4 * (5 + (3 + 7) + (4 + 4 * 5 + 5 * 8 * 9) * 5)
-5 + 4 * 9 * ((2 * 4 + 8 * 2 * 7 + 2) + 4) * 9 * 3
-3 + 6 * (6 + 2 + 3 * 2) + (3 + 5) + ((3 * 6 + 5 + 7 + 8 * 8) * 9 + (5 + 8 * 7 + 6 * 8 + 7) + 7 + 8 + 5)
-7 * ((7 + 5 * 3 * 5 + 4) + 7 + (6 * 3 * 6 * 6 * 7 * 7))
-((5 + 7 * 9 * 2 + 3) * 2 + 9 * 3) * (4 + 6) * (4 * 7 * (9 + 6 * 8 + 5) * (3 + 8 + 9) + 9 * (8 + 6 * 9 + 6)) * 6 + 4
-2 * (6 * 3 + 4 + 4 * 2) + 6 + 7 + 5
-2 + 7 + 5 + 5 * ((7 * 6 + 2) * 8 * 8) + (2 * 5 * 4 * 5)
-3 + (7 * 8 * 5) + 5 + (5 + (4 * 4 + 7 + 2) + 6 + (8 + 3) * 9 + 4)
-6 * (9 + 5 + 6) * 5 + 5 * (7 * (3 * 5 + 6 + 2 * 5) * 2)
-(9 + 6 + (9 + 7 * 5 + 6 * 7) * 7 * 3) + 3 + 4 + 6
-7 * ((5 + 4 + 6) + 7) + 2 * 3 + (6 + 9 * (6 * 4 * 8 * 3 + 4 * 2) + 7) + 3
-7 * (8 + 9 + 5 * (9 * 7 * 9) + 2) + (7 + 7 + (7 + 3 + 2 * 2) + 4 * 2)
-3 * (2 * (4 + 6) * 8)
-8 + ((6 * 4 * 8 + 4) + 7) * 7
-(7 + (2 + 8 * 8 * 6 * 2)) + 7 * 2
-(4 * 2 + 4 * 8 + 4) + (3 * 9 + (2 * 4 + 2 * 7) * 9 + 7) * (5 + 9) * (7 + (3 * 4 * 4 * 6) + 8 * 7) + 8 + 8
-8 + (2 + 2 * 8 * 7 + 7) + 2 + 4 * 3 + (8 + 9 * 9)
-3 + 2 + 8 + (9 + 3 * (3 + 2 + 9 + 7) + 4 * 4 * 7) * 3
-5 * 4 * 7 * 3 + (9 * (6 * 6 + 2 * 4) * 8 + 2 * 9)
-4 * 7 * (3 + 6 * 6 + 4 + 8) + 5
-(8 + (8 + 2 * 9 + 3 * 3) * 8 * 8 * (9 * 6 + 2 * 6)) * 9 + 5 * 2 + 5
-5 + 6 + 3 + 4 * 9 + (4 + (4 + 3 + 9 * 2) + 4)
-3 * (5 + 3) * 7 + 6
-((3 * 2 + 2 * 6 + 5 + 3) + 4) + (4 * (8 + 2 + 9 * 2) * 8 + (8 * 3 + 6 + 2 + 6) * 2) + 7 + 2 * 9
-6 * 8 * ((8 * 8 + 3 * 7 + 8 * 4) * 4 + 9) + (8 * 7 * (6 * 8 * 3 * 2) * 3) * 2 * 8
-(2 * 7 + 4) * 2 * (5 * 4 + 2 + 5 + (7 + 5) * (4 * 3 + 6 * 8 * 5 + 9)) * 5
-(6 * 8) * (7 * 7 + 8 * 3 * 3) * (5 * 8 + 2)
-(6 + 6 * 2) * 5 + ((7 * 6 * 8) * 8 * 9 * 4)
-(8 * 4 * 9) + ((5 * 3 + 6 * 3) + (9 + 9 + 9 * 2 * 2) * (4 + 9 * 7 + 2 * 2 + 3) + 6) * 7 * 6 * 6
-((4 + 3) * (2 * 5 + 8 * 2 * 4) * 9) + 6 + (6 + (5 * 4 * 5 * 3 + 3) * 6 * (5 * 3 + 7 * 2 + 4 + 8)) + 4 + 7
-(6 * 9 + 9 + 7) * (6 * 2 * (4 * 7 * 4 + 4 * 5 + 7) + (7 + 5 * 8 * 4 + 9 + 6)) * 7 + 8 * 5 + (9 * 5 * 2 + 7)
-6 * 6 + ((2 + 9) * 5 + 2 * 3 + 3 * 3) + 9 * ((4 * 7) + 5 + 8 + 4)
-5 + (4 * 5 + 5 * 3 + 7) * 6 * 5 + (2 + (9 + 7 + 8 + 4))
-(2 * 4 + 5 + 8 + 6 * 9) + 3 + 6
-9 + (9 + 8 * 3) * (3 + 8 + 6 + 5) * 5
-(3 + 9 * 5 + 7) + 2
-((9 + 5 * 2) * 5 + (4 + 2 * 7) + 9) * 8
-(4 + 4) * 9 + 3 + 2 * 8
-(3 + 4 * 8 + 9 * 6 + 6) * 5 + 8 + 9
-3 * 8 + 9 * (3 * 4)
-6 + 7 * 6 * 7
-3 * 3 + (8 * 8 * 9 + 3 * 8 + 2) * 3 + 8 * 2
-5 + ((6 + 2 * 6) * 8 + 6 * 5) + ((7 + 3) + 2 * 5 + 7 + 6 + 5) + (8 + 2 * 7 + 4 + 2 * 3) * 2 * 5
-(6 * (6 * 7) * 7 + 3) * 9 + 6 * 3
-(5 * 9 + 7) + 8
-(3 + 9 * 3 * 9 * 2) * 9 * 5
-5 + (6 * 3)
diff --git a/day19.ml b/day19.ml
deleted file mode 100644
index c359176..0000000
--- a/day19.ml
+++ /dev/null
@@ -1,103 +0,0 @@
-#load "str.cma";;
-
-(* Common util. Should probably put this in a module or something.. *)
-let get_one_line file =
-  try Some (input_line file) with
-    End_of_file -> None
-
-let get_lines file =
-  let rec input lines =
-    match get_one_line file with
-      Some line -> input (line :: lines)
-    | None -> List.rev lines
-  in input []
-
-let read_file file =
-  let channel = open_in(file) in
-  get_lines channel
-
-let explode s = (* convert a string to a list of chars *)
-  let rec exp i l =
-   if i < 0 then l else exp (i - 1) (s.[i] :: l) in
-  exp (String.length s - 1) []
-
-let implode l = String.of_seq (List.to_seq l)
-
-let (<<) f g x = f(g(x))
-let (>>) f g x = g(f(x))
-
-let rec find_idx nth x = function (* find nth index of x in a list *)
-  | [] -> raise (Failure "Not Found")
-  | h :: t ->
-      if x = h
-      then if nth = 0 then 0 else 1 + find_idx (nth-1) x t
-      else 1 + find_idx nth x t
-
-let rec take n l = (* take the first n elements *)
-  match n with
-  | 0 -> []
-  | n ->
-      match l with
-      | [] -> []
-      | x :: xs -> x :: (take (n-1) xs)
-
-let rec drop n l = (* drop the first n elemnts *)
-  match n with
-  | 0 -> l
-  | n -> drop (n-1) @@ List.tl l
-
-let string_of_char = String.make 1
-
-(* --- *)
-
-type rule = Char of char | List of int list | Pair of rule * rule
-type rule' = Char' of char | List' of rule' list | Pair' of rule' * rule' (* deref'd *)
-
-let rec string_of_rule' = function
-  | Char' x -> string_of_char x
-  | List' l -> List.fold_left (fun acc x -> acc ^ (string_of_rule' x)) "" l
-  | Pair' (a, b) -> "\\(" ^ (string_of_rule' a) ^ "\\|" ^ (string_of_rule' b) ^ "\\)"
-
-let rec rule_of_string str =
-  let str' = String.trim str in
-  if String.contains str' '|'
-  then let [l; r] = String.split_on_char '|' str' in
-    Pair (rule_of_string l, rule_of_string r)
-  else if String.contains str' '"' then
-    Char (String.get str' 1)
-  else
-    List (List.map int_of_string (String.split_on_char ' ' str'))
-
-let parse_rule_line line =
-  let [key; rule_string] = String.split_on_char ':' line in
-  let rule = rule_of_string rule_string in
-  (int_of_string key, rule)
-
-let read_chunks lines =
-  let blank_idx = find_idx 0 "" lines in
-  let rules = take blank_idx lines |> List.map parse_rule_line in
-  let messages = drop blank_idx lines in
-  (rules, messages)
-
-let rec deref rules depth rule =
-  if depth > 20 (* CHEATER MODE *)
-  then List' []
-  else
-    match rule with
-    | Char x -> Char' x
-    | Pair (a, b) -> Pair' (deref rules (depth+1) a, deref rules (depth+1) b)
-    | List l -> List' (List.map (fun key ->
-        let rule = List.assoc key rules in
-        deref rules depth rule) l)
-
-let () =
-  let (rules, messages) = read_file "day19.txt" |> read_chunks in
-
-  let rule0 = deref rules 0 (List.assoc 0 rules) in
-  print_string (string_of_rule' rule0);
-
-  let rule0_str = string_of_rule' rule0 in
-  let r = Str.regexp ("^" ^ rule0_str ^ "$") in
-
-  let good = List.filter (fun m -> Str.string_match r m 0) messages in
-  Printf.printf "\nnum good: %i" (List.length good);
diff --git a/day19.txt b/day19.txt
deleted file mode 100644
index bee4b49..0000000
--- a/day19.txt
+++ /dev/null
@@ -1,514 +0,0 @@
-76: 125 57 | 102 58
-6: 57 30 | 58 123
-62: 58 58 | 57 58
-90: 122 57 | 87 58
-82: 57 58 | 57 57
-118: 102 57 | 125 58
-7: 103 57 | 77 58
-130: 27 58 | 53 57
-101: 58 107 | 57 117
-31: 55 58 | 81 57
-114: 123 57 | 62 58
-48: 103 58 | 94 57
-105: 58 113 | 57 20
-100: 57 88 | 58 35
-127: 121 54
-80: 54 58 | 72 57
-19: 5 58 | 102 57
-28: 95 57 | 23 58
-43: 30 58 | 123 57
-119: 58 71 | 57 33
-44: 94 58 | 24 57
-72: 58 58
-35: 109 57 | 106 58
-85: 127 58 | 132 57
-25: 57 30 | 58 102
-42: 119 58 | 111 57
-86: 58 5 | 57 125
-54: 57 121 | 58 57
-88: 58 97 | 57 129
-71: 110 57 | 46 58
-67: 94 57 | 125 58
-12: 5 58 | 62 57
-112: 58 70 | 57 69
-123: 58 57
-52: 10 58 | 48 57
-122: 14 58 | 68 57
-68: 82 58 | 94 57
-23: 57 54 | 58 24
-64: 58 54 | 57 72
-89: 41 57 | 28 58
-132: 103 58 | 47 57
-115: 58 133 | 57 49
-116: 58 103 | 57 77
-15: 77 57 | 24 58
-92: 58 62 | 57 30
-4: 58 99 | 57 75
-59: 57 72 | 58 102
-26: 52 57 | 108 58
-58: "b"
-14: 58 103 | 57 30
-47: 57 57 | 58 58
-37: 58 82 | 57 125
-32: 125 57 | 123 58
-95: 123 58 | 123 57
-83: 57 36 | 58 79
-128: 65 58 | 32 57
-125: 57 58 | 58 57
-11: 42 31 | 42 11 31
-65: 62 58
-75: 58 1 | 57 67
-30: 57 57
-102: 121 121
-0: 8 11
-111: 50 57 | 93 58
-113: 57 126 | 58 40
-129: 25 58 | 29 57
-45: 5 57 | 94 58
-104: 24 121
-24: 58 121 | 57 58
-49: 57 12 | 58 6
-17: 57 123 | 58 54
-3: 74 57 | 131 58
-94: 57 57 | 58 57
-98: 57 86 | 58 2
-13: 34 57 | 78 58
-21: 57 98 | 58 120
-107: 86 58 | 17 57
-57: "a"
-9: 57 112 | 58 90
-40: 57 104 | 58 45
-38: 58 94 | 57 30
-106: 57 63 | 58 76
-97: 57 60 | 58 116
-96: 57 77 | 58 72
-41: 63 57 | 19 58
-63: 24 58 | 62 57
-78: 57 47 | 58 103
-131: 30 57 | 62 58
-77: 57 58
-55: 57 9 | 58 100
-69: 96 58 | 43 57
-36: 72 57 | 123 58
-33: 58 101 | 57 26
-53: 58 47 | 57 94
-70: 38 58 | 37 57
-20: 84 57 | 13 58
-2: 57 123 | 58 72
-84: 58 16 | 57 66
-34: 58 5 | 57 62
-56: 85 58 | 3 57
-126: 15 57 | 59 58
-87: 57 80 | 58 51
-93: 58 61 | 57 4
-99: 58 92 | 57 16
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-10: 57 24 | 58 62
-27: 57 30
-29: 54 57 | 103 58
-103: 57 121 | 58 58
-46: 57 18 | 58 130
-50: 89 57 | 115 58
-79: 57 5 | 58 103
-1: 123 58 | 77 57
-61: 57 128 | 58 39
-109: 116 58 | 96 57
-66: 82 57 | 47 58
-117: 53 58 | 91 57
-124: 118 57 | 7 58
-22: 77 57 | 125 58
-39: 58 66 | 57 44
-51: 58 77 | 57 47
-73: 57 56 | 58 21
-60: 77 57 | 82 58
-91: 24 58 | 123 57
-16: 30 58 | 82 57
-120: 22 57 | 64 58
-81: 57 105 | 58 73
-133: 58 114 | 57 44
-18: 57 60 | 58 22
-8: 42 | 42 8
-108: 58 10 | 57 118
-74: 30 57 | 77 58
-121: 58 | 57
-5: 57 57 | 58 121
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