#include <stdio.h>
#include <stdlib.h>
typedef struct {
    int Num;
    char *Text; 
    } base; 
int main() {
    base *list = malloc(4 * sizeof *list);
    int *p = malloc(4 * sizeof *list);
    *(p + 0) = 0;
    *(p + 1) = 0;
    *(p + 2) = 0;
    *(p + 3) = 0;
    (*(list + 0)).Num = 0;
    (*(list + 0)).Text = "א";
    (*(list + 1)).Num = 1;
    (*(list + 1)).Text = "A";
    (*(list + 2)).Num = 2;
    (*(list + 2)).Text = "B";
    (*(list + 3)).Num = 3;
    (*(list + 3)).Text = "C";
    while (*(p + 0) < 4) {
        *(p + 1) = 0;
        while (*(p + 1) < 4) {
            *(p + 2) = 0;
            while (*(p + 2) < 4) {
                *(p + 3) = 0;
                while (*(p + 3) < 4) {
                    printf("%s",(*(list + *(p + 0))).Text);
                    printf("%s",(*(list + *(p + 1))).Text);
                    printf("%s",(*(list + *(p + 2))).Text);
                    printf("%s\n",(*(list + *(p + 3))).Text);
                    *(p + 3) += 1;
                }
                *(p + 2) += 1;
            }
            *(p + 1) += 1;
        }
        *(p + 0) += 1;
    }

    free(list);
    free(p);
    return 0;
}