#include <stdio.h>
#include <stdlib.h>

int main (){
    int hoehe = 6;
    int breite = 6;
    int i = 0;
    int z = 0;
    int j = 0;
    int a = 0;
    int breitea = breite + 2;
    for (i = 1;i <= breitea; i++){
        printf("A");
    }
    for (z = 1;z <= hoehe; z++){
        printf ("\nA");
        for (j = 1; j <= breite; j++){
            printf ("B");
        }
        printf ("A");
        }
    printf ("\n");
    for (a = 1;a <= breitea; a++){
        printf("A");
    }
}