from collections import deque
q = [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')
mod = 4
K = int(input())
for i in range(K):
    x = q[i%mod].popleft()
    q[(i+1)%mod].append(x)
for i in range(4):
    print(*q[i],sep='')