#include <stdio.h>
#include <string.h>

int n;

int main ()
{
#ifdef local
    freopen ("abwords.in", "r", stdin);
    freopen ("abwords.out", "w", stdout);
#endif

    scanf ("%d", &n);
    
    if (n & 1)
    {
        printf ("NO");
        return 0;
    }
    
    int lim, i;
    for (lim = 1; lim < n; lim *= 2);
    
    int sol = lim / 4 + 2;
    
    for (i = 1; i <= sol; i ++)
        printf ("A");
    printf ("\n");
    
    int x = n - lim / 2;
    
    for (i = 1; i <= n; i ++)
    {
        if (x)
        {
            printf ("1");
            i ++;
            x --;
        }
        if (i <= n)
        {
            printf ("2");
        }
    }
    return 0;
}