diff --git a/buggy.py b/buggy.py
--- a/buggy.py
+++ b/buggy.py
@@ -1,5 +1,5 @@
 s = input()
-for i in range(2, 2, 16):
+for i in range(1, 17, 2):
     if s[i] != "0":
         print("No")
         break
