#include <cstdio>
#include <algorithm>
#include <string>

using namespace std;

int N;
//char A[200];
//int sz;
//string aux;

int main()
{
    scanf("%d", &N);

    if (N <= 4)
    {
        if (N == 1)
            printf("NO\n");
        else if (N == 2)
            printf("AA\n11\n");
        else if (N == 3)
            printf("AAA\n221\n");
        else if (N == 4)
            printf("AAAA\n2222\n");
        return 0;
    }

    int pw = 1;
    while (pw < N) pw *= 2;

    if (N % 2 == 1)
    {
        pw /= 2;
        pw += 1;

        //sz = pw;
        for (int i = 0; i < pw; ++i)
            printf("A");
        printf("\n");

        int tm = N - pw + 1;
        for (int i = 0; i < tm; ++i)
        {
            //aux += '1';
            //aux += '2';
            printf("12");
        }
        for (int i = 0; i < N - 2 * tm; ++i)
        {
            //aux += '2';
            printf("2");
        }
        printf("\n");
    }
    else
    {
        pw /= 2;
        pw /= 2;
        pw += 2;

        //sz = pw;
        for (int i = 0; i < pw; ++i)
            printf("A");
        printf("\n");

        int tm = N - (pw - 2) * 2;
        for (int i = 0; i < tm; ++i)
        {
            //aux += '1';
            //aux += '2';
            printf("12");
        }
        for (int i = 0; i < N - 2 * tm; ++i)
        {
            //aux += '2';
            printf("2");
        }
        printf("\n");
    }

    /*for (int i = 0; i < sz; ++i)
        A[i] = 'A';
    for (int i = 0; i < int(aux.size()); ++i)
    {
        printf("%s\n", A);

        if (aux[i] == '1')
        {
            if (A[sz - 1] == 'A') A[sz - 1] = 'B';
            else                  A[sz - 1] = 'A';
        }
        else
        {
            char oldA = A[0];
            for (int j = 1; j < sz; ++j)
                if (A[j] == oldA)
                {
                    oldA = A[j];
                    A[j] = 'B';
                }
                else
                {
                    oldA = A[j];
                    A[j] = 'A';
                }
        }
    }
    printf("%s\n", A);*/
}
