from collections import deque

K = int(input())

q = [deque(['A', 'E']), deque(['B']), deque(['C']), deque(['D'])]
for i in range(K):
    v = q[i % 4].popleft()
    q[(i + 1) % 4].append(v)

for i in range(4):
    print(''.join(q[i]))