diff --git a/buggy.py b/buggy.py
--- a/buggy.py
+++ b/buggy.py
@@ -1,7 +1,7 @@
 S = input().strip()
 
 for i in range(1, 9):
-    if S[2 * i - 1] != 0:
+    if S[2 * i - 1] != "0":
         print("No")
         exit()
 print("Yes")
