from collections import deque

d = [deque() for _ in range(4)]
d[0].append('A')
d[0].append('E')
d[1].append('B')
d[2].append('C')
d[3].append('D')

for i in range(int(input())):
    d[(i + 1) % 4].append(d[i % 4].popleft())

for i in range(4):
    print(''.join(d[i]))