import collections
Q = [collections.deque() for _ in range(4)]
Q[0].append('A')
Q[0].append('E')
Q[1].append('B')
Q[2].append('C')
Q[3].append('D')
K = int(input())
for i in range(1,K+1):
    temp = Q[(i-1)%4].popleft()
    Q[i%4].append(temp)
for q in Q:
    print(''.join(map(str, q)))