#include<bits/stdc++.h>
using namespace std;
int main(){
int n;
char ans;
cin>>n;
switch(n){
case 1:ans='A';break;
case 2:ans='A';break;
case 3:ans='A';break;
case 4:ans='A';break;
case 5:ans='A';break;
case 6:ans='A';break;
case 7:ans='A';break;
case 8:ans='A';break;
case 9:ans='A';break;
case 10:ans='A';break;
case 11:ans='A';break;
case 12:ans='A';break;
case 13:ans='A';break;
case 14:ans='A';break;
case 15:ans='A';break;
}