from collections import deque
K = int(input())
ans = [deque() for _ in range(4)]

ans[0].append('A')
ans[0].append('E')
ans[1].append('B')
ans[2].append('C')
ans[3].append('D')

for i in range(K):
    target = i%4
    target2 = (target + 1)%4
    ans[target2].append(ans[target].popleft())

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