#include <stdio.h>

int main()
{
	int i, K;
	char c, q[4][3] = {"AE", "B", "C", "D"};
	scanf("%d", &K);
	for (i = 0; i < K; i++) {
		c = q[i%4][0];
		q[i%4][0] = q[i%4][1];
		q[i%4][1] = 0;
		q[(i+1)%4][1] = c;
		q[(i+1)%4][2] = 0;
	}
	for (i = 0; i < 4; i++) printf("%s\n", q[i]);
	fflush(stdout);
	return 0;
}