#include<cstdio>

using namespace std;

int main()
{
    int n, m, i;
    scanf("%d", &n);
    if(n <= 8)
    {
        if(n == 2)
            printf("AA\n11");
        if(n == 3)
            printf("AAA\n221");
        if(n == 4)
            printf("AAA\n2222");
        if(n == 5 || n == 7)
            printf("NO");
        if(n == 6)
            printf("AABB\n221212");
        if(n == 8)
            printf("AAAA\n12121212");
        return 0;
    }
    if(n % 2 == 1)
    {
        printf("NO");
        return 0;
    }
    else
    {
        m = 1;
        while(m + m < n)
        {
            m += m;
        }
        for(i = 1; i <= m / 2 + 1; ++ i)
            printf("A");
        printf("\n");
        for(i = 1; i <= n - m; ++ i)
            printf("12");
        for(i = 1; i <= m + m - n; ++ i)
            printf("2");
    }
    return 0;
}
