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: Wrong Answer)

#include<bits/stdc++.h>
#define __STDC_LIMIT_MACROS
#include <stdint.h>
using namespace std;
#define int             long long
#define endl '\n'	 
bool isPrime(int n)
{
	if (n <= 1)
		return false;
	if (n <= 3)
		return true;
	if (n % 2 == 0 || n % 3 == 0)
		return false;
	for (int i = 5; i * i <= n; i += 6)
	{
		if (n % i == 0 || n % (i + 2) == 0)
			return false;
	
	}
	return true;
}
 
void c_p_c()
{
#ifndef ONLINE_JUDGE
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);
#endif
 
}
bool how(pair<int,int> a, pair<int, int>b)
{
	return a.second<b.second;
}
 
int32_t main()
 
{
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	//c_p_c();
	char c;
	cin>>c;
	if(c>='A')
	{
		cout<<'a'<<endl;
	}
	else
	{
		cout<<'A'<<endl;
	}
}