K = int(input())

queues = [
    ['A', 'E'],
    ['B'],
    ['C'],
    ['D']
]

for i in range(K):
    current = i % 4
    elem = queues[current].pop(0)
    next_queue = (current + 1) % 4
    queues[next_queue].append(elem)

for q in queues:
    print(''.join(q))