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 <iostream>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <queue>
#include <set>
#define REP(i, n) for (int i = 0; i < (n); ++i)
using namespace std;
constexpr int INF = 1 << 30;

using ll = long long;

int main()
{
  cin.tie(0);
  ios_base::sync_with_stdio(false);
  char c;
  cin >> c;
  if ('A' <= c && c <= 'Z')
  {
    cout << 'A';
  }
  else
  {
    cout << 'a';
  }
  return 0;
}