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

int main() {
    int k;
    scanf("%d", &k);
    char queue[4][3] = {
        "AE", "B", "C", "D"
    };

    for(int i=0;i<k;i++) {
        int j = i % 4;
        char ch = queue[j][0];
        queue[j][0] = queue[j][1];
        queue[j][1] = '\0';
        int l = (j + 1) % 4;
        queue[l][1] = ch;
    };

    for(int i=0;i<4;i++) {
        printf("%s\n", queue[i]);
    }

    return 0;
}