This was day8, not 7

day8/main.exs

@@ -1,4 +1,4 @@
-defmodule Day7 do
+defmodule Day8 do
   def run do
     map =
       File.read!("data.txt")
@@ -126,4 +126,4 @@ defmodule Day7 do
   end
 end
 
-Day7.run()
+Day8.run()