from collections import deque


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

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

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


if __name__ == "__main__":
    main()