mod = 1000000007
eps = 10**-9
M = 5 * 10 ** 6


def main():
    import sys
    from collections import deque
    input = sys.stdin.readline

    Q = []
    Q.append(deque(["A", "E"]))
    Q.append(deque(["B"]))
    Q.append(deque(["C"]))
    Q.append(deque(["D"]))
    for i in range(int(input())):
        s = Q[i%4].popleft()
        Q[(i+1) % 4].append(s)
    for i in range(4):
        S = "".join(list(Q[i]))
        print(S)


if __name__ == '__main__':
    main()