#include <iostream>
#include <cstdio>
#include <math.h>
using namespace std;
int n,m;
int main(){
    scanf("%d",&n);
    if (n%2==1){printf("NO\n");return 0;}
    if (n==2){printf("AA\n22\n");return 0;}
    if (n==4){printf("AAA\n2222\n");return 0;}
    m=0;
    for (int i=1;i<n;i*=2){++m;}
    m=pow(2,m-1);
    for (int i=0;i<m/2+2;++i){printf("A");}
    printf("\n");
    for (int i=0;i<n;++i){
        if (i%2==0&&i/2<n-m){printf("1");}
        else{printf("2");}
    }printf("\n");
    return 0;
}
