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>
#define REP(i,  n) for (int i  =  0; i < (int)(n); ++i)
#define REPR(i,  n) for (int i  =  n - 1; i >= 0; --i)
using namespace std;
#define int long long int
//------------ATCODER TEMPLATE-------------

signed main() {
  char a; cin >> a;
  if (islower(a)) cout << "a" << endl;
  else            cout << "A" << endl;
  return 0;
}