1519: 字符判断

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:42 Solved:11

Description

对于给定的字符,如果该字符是大小写字母或者数字,输出YES, 否则输出NO

Input

一个字符

Output

按照题目要求输出YES或者NO

Sample Input Copy

A

Sample Output Copy

YES

Source/Category