from collections import deque
L = [deque(['A', 'E']), deque(['B']), deque(['C']), deque(['D'])]

k = int(input())
for i in range(k):
    s = L[i % 4].popleft()
    L[(i + 1) % 4].append(s)
for i in range(4):
    print(''.join(L[i]))