#include<iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;
    if (n==2) cout<<"AA"<<endl<<"11"<<endl;
    else if (n==3) cout<<"ABB"<<endl<<"212"<<endl;
    else if (n==4) cout<<"AAA"<<endl<<"2222"<<endl;
    else if (n==5) cout<<"AAAB"<<endl<<"12222"<<endl;
    else if (n==6) cout<<"AABB"<<endl<<"221212"<<endl;
    else cout<<"NO"<<endl;
    return 0;
}
