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++ (Clang 10.0.0) (judge verdict: Wrong Answer)


#include<iostream>
#include <string.h>
#include<stdio.h>
#include <vector>
#include <math.h>


using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)


int main(){
	long long int N;
	cin >> N;
	string ans;
	while (N) {
		N--;
		ans += 'a' + N % 26;
		N /= 26;

	}
	reverse(ans.begin(), ans.end());
	cout << ans << endl;

return 0;
}