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: Runtime Error)

#include <stdio.h>

#include <ctype.h>
int main (){
  char s[2];
  scanf("%s", s);
  if(islower(s)){
    printf("a");
  }else{
      printf("A");
    }
  return 0;
    }