diff --git a/medium.txt b/medium.txt
new file mode 100644
index 0000000..97b3d1a
--- /dev/null
+++ b/medium.txt
@@ -0,0 +1,15 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15