from collections import deque
K = int(input())
que = [None] * 4
que[0] = deque(['A', 'E'])
que[1] = deque(['B'])
que[2] = deque(['C'])
que[3] = deque(['D'])
for i in range(K):
  q = que[i % 4].popleft()
  que[(i + 1) % 4].append(q)
for i in range(4):
  ans = list(que[i])
  print(''.join(ans))