from collections import deque

q0 = deque(["A", "E"])
q1 = deque(["B"])
q2 = deque(["C"])
q3 = deque(["D"])
que = [q0, q1, q2, q3]
K = int(input())
for i in range(K):
    idx = i % 4
    v = que[idx].popleft()
    idx = (i + 1) % 4
    que[idx].append(v)
for q in que:
    print("".join(q))