from collections import deque
p = []
p.append(deque(["A","E"]))
p.append(deque(["B"]))
p.append(deque(["C"]))
p.append(deque(["D"]))
k = int(input())
for i in range(k):
    m = p[i % 4].popleft()
    p[(i + 1)%4].append(m)
for i in range(4):
    print("".join(p[i]))