diff --git a/worksheet0/foo.txt b/worksheet0/foo.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d5350780851e08aaedd2183b7b88e06e4fa4211d
--- /dev/null
+++ b/worksheet0/foo.txt
@@ -0,0 +1,5 @@
+10
+20
+30
+40
+54