from collections import deque


def main():
    queues = [deque(["A", "E"]),
              deque("B",),
              deque("C",),
              deque("D",)]

    K = int(input())
    for i in range(K):
        popped = queues[i % 4].popleft()
        queues[(i+1) % 4].append(popped)

    for queue in queues:
        print("".join(queue))


if __name__ == "__main__":
    main()