diff --git a/buggy.py b/buggy.py
--- a/buggy.py
+++ b/buggy.py
@@ -1,6 +1,6 @@
 a = list(map(int, input().split()))
 ans = []
-for i in range(12):
+for i in range(13):
     i += 1
     s = a.count(i)
     if s == 0:
