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;

typedef vector<int> vi;
typedef pair<int, int> pi;
typedef long long ll;

#define show(x) cerr << #x << " = " << x << endl;
#define all(x) (x).begin(), (x).end()
#define allr(x) (x).rbegin(), (x).rend()

ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;}


int main()
{
  ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);

  char letter;
  cin >> letter;
  if(isupper(letter)){
    cout << "A" << endl;
  }else{
    cout << "a" << endl;
  }

  return 0;
}