题目描述
An uppercase or lowercase English letter $\alpha$ will be given as input. If $\alpha$ is uppercase, print A; if it is lowercase, print a.
Constraints
- $\alpha$ is an uppercase (
A-Z) or lowercase (a-z) English letter.
Input
Input is given from Standard Input in the following format:
α
Output
If $\alpha$ is uppercase, print A; if it is lowercase, print a.
Examples
Input
B
Output
A
Input
a
Output
a
输入格式
见题面
输出格式
见题面
样例输入
a
样例输出
a