hello world! A boy is coming.
yes
#!/usr/bin/env python
# -*- coding:utf-8 -*-
if __name__ == ‘__main__‘:
input_string = input()
if ‘A‘ in input_string or ‘a‘ in input_string:
print(‘yes‘)
else:
print(‘no‘)
原文：https://www.cnblogs.com/SkystarX/p/12180852.html