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 <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <iomanip>
#include <map>
#include <set>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <iterator>
#include <string>
#include <limits>

using namespace std;

using i64 = int64_t;
using P = pair<i64, i64>;
//i64 mod = 1000000007;
i64 mod = 998244353;
int int_max = 2147483647;
i64 INF = 1e16;
int max_n = 1e5;


int main(int argc, char **argv) {
    char c;
    cin >> c;
    cout << ((c - 'a') >= 0 ? 'a' : 'A') <<endl;

    return 0;
}