from collections import deque
q = [deque() for i in range(4)]
q[0].append("A")
q[1].append("B")
q[2].append("C")
q[3].append("D")
q[0].append("E")

k = int(input())
for i in range(k):
	t = q[i%4].popleft()
	q[(i+1)%4].append(t)

for i in range(4):
	print("".join(q[i]))