diff --git a/2012/grothe/.gitignore b/2012/grothe/.gitignore
index 8d6b4ec9b..0fc8c9617 100644
--- a/2012/grothe/.gitignore
+++ b/2012/grothe/.gitignore
@@ -2,3 +2,7 @@ grothe
 grothe.c.1
 grothe.c.2
 cookie_recipe_restore.txt
+cookie_piece1.dat
+cookie_piece2.dat
+cookie_piece3.dat
+cookie_piece4.dat
diff --git a/2012/grothe/cookie_piece1.dat b/2012/grothe/cookie_piece1.dat
deleted file mode 100644
index 5c415075b..000000000
Binary files a/2012/grothe/cookie_piece1.dat and /dev/null differ
diff --git a/2012/grothe/cookie_piece2.dat b/2012/grothe/cookie_piece2.dat
deleted file mode 100644
index e6de76b18..000000000
Binary files a/2012/grothe/cookie_piece2.dat and /dev/null differ
diff --git a/2012/grothe/cookie_piece3.dat b/2012/grothe/cookie_piece3.dat
deleted file mode 100644
index 6778a1cde..000000000
Binary files a/2012/grothe/cookie_piece3.dat and /dev/null differ
diff --git a/2012/grothe/cookie_piece4.dat b/2012/grothe/cookie_piece4.dat
deleted file mode 100644
index 815dc96f2..000000000
Binary files a/2012/grothe/cookie_piece4.dat and /dev/null differ