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 <bits/stdc++.h>
using namespace std;
 
using ll = int64_t;
constexpr ll mod = ll(1e9 + 7);
 
int main () {
  ios::sync_with_stdio(0); cin.tie(0);
 
  int TT = 1;
//  cin >> TT;
  while (TT--) {
    char c;
    cin >> c;
    if (isupper(c)) {
      cout << 'A' << endl;
    } else {
      cout << 'a' << endl;
    }
    
  }
}