from collections import deque
Queue = [deque(("A", "E")), deque(("B")), deque(("C")), deque(("D"))]
K = int(input())
for i in range(K):
    Queue[(i+1)%4].append(Queue[i%4].popleft())
for i in range(4):
    ans = ""
    while Queue[i]:
        ans += Queue[i].popleft()
    print(ans)