diff --git a/Aoc.hs b/Aoc.hs
new file mode 100644
index 0000000..51810fd
--- /dev/null
+++ b/Aoc.hs
@@ -0,0 +1,3 @@
+module Aoc (splitOn) where
+
+splitOn c l|(h,_:t)<-span(/=c) l=h:splitOn c t|let=[l]