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<stdio.h>
#include<math.h>
#include<string.h>
#include<string>
#include<stack>
#include<map>
#include<set>
#include<queue>
#include<iostream>
#include<algorithm>
#include<unordered_map>
#include<unordered_set>
#define PI acos(-1)
#define pb push_back
#define all(x) x.begin(),x.end()
#define INF 0x3f3f3f3f
#define dd(x) cout<<#x<<" = "<<x<<","
#define de(x) cout<<#x<<" = "<<x<<"\n"
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int N=1e6+5;
char c[N];
int main()
{
	scanf("%s",c+1);
	if(c[1]>='A'&&c[1]<='Z'){
		printf("A");
	}
	else{
		printf("a");
	}
}