import collections
K = int(input())
lsq = [collections.deque(['A','E']),collections.deque(['B']),collections.deque(['C']),collections.deque(['D'])]

for i in range(K):
    lsq[(i+1)%4].append(lsq[i%4].popleft())

for i in range(4):
    print(*lsq[i],sep='')