#include <bits/stdc++.h>
using namespace std;
#define MAXN 2000

int n;
int main() {
    scanf("%d", &n);
    if(n==6){
        cout << "AABB" << endl << 221212 << endl;
    }else if(n==2){
        cout << "AA" << endl << 11 << endl;
    }else if(n==3){
        cout << "AAA" << endl << 122 << endl;
    }else{
        cout << "NO" << endl;
    }
}
