from collections import deque
q = [None] * 4
q[0] = deque(["A","E"])
q[1] = deque(["B"])
q[2] = deque(["C"])
q[3] = deque(["D"])

K = int(input())
for i in range(K):
    q[(i + 1) % 4].append(q[i % 4].popleft())
    
for i in range(4):
    L = list(q[i])
    print("".join(L))