Problem:
Score : 100 points

Problem Statement

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.

Sample Input 1

B

Sample Output 1

A

B is uppercase, so we should print A.

Sample Input 2

a

Sample Output 2

a

a is lowercase, so we should print a.

Solution in C (GCC 9.2.1) (judge verdict: Accepted)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

int main()
{
	char alpha;
	char moji;
	
	// 文字の入力
	scanf("%c", &alpha);
	
	// 判定
	for(moji='A'; moji<='Z'; ++moji){
	
		if(alpha == moji){
			printf("A");
		}
	}
	
	// 判定
	for(moji='a'; moji<='z'; ++moji){
	
		if(alpha == moji){
			printf("a");
		}
	}

	return 0;
}