Submission #162146

---

Source Code Expand

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys

def main():
    a = sys.stdin.readline().rstrip()
    if a=="a": b="-1"
    elif a[-1]=='a': b = a[0:-1]
    else: b = a[0:-1]+chr(ord(a[-1])-1)

    print b

if __name__=='__main__':
    main()

Submission Info

Judge Result