/*
    Look at me!
    Look at me!
    The monster inside me has grown this big!

*/

#include<cstdio>
#include<map>
#include<set>
#define FIT(a,b) for(vector<int>::iterator a=b.begin();a!=b.end();a++)
#include<stack>
#define ROF(a,b,c) for(int a=b;a>=c;--a)
#include<vector>
#include<algorithm>
#define FOR(a,b,c) for(int a=b;a<=c;++a)
#define REP(a,b) for(int a=0;a<b;++a)
#include<cstring>
#include<bitset>
#include<cmath>
#include<iomanip>
#include<queue>
#define debug cerr<<"OK";
#define pii pair<int,int>
#define f cin
#define g cout
#define pii pair<int,int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define ll long long
#define ull unsigned long long
#define mod 1000000007
#define SQ 350
#define N 100100
#define NM 1100000
#define M 21
using namespace std;
/*ifstream f("a.in");
ofstream g("a.out");*/
/*int dx[]={0,0,0,1,-1};
int dy[]={0,1,-1,0,0};*/
int n;
int main ()
{
   
    
    scanf("%d",&n);
    if(n==2)
    printf("A\n11");
    else
    if(n==4)
    printf("AAA\n2222");
    else
    if(n==4)
    printf("AAAA\n222");
    else
    if(n==8)
    printf("AAAAA\n22222222");
    else
    if(n==6)
    printf("AABB\n221212");
    else
    printf("NO");
    return 0;
}