from collections import deque

n = int(input())
que = [deque() for i in range(4)]
que[0].append("A")
que[1].append("B")
que[2].append("C")
que[3].append("D")
que[0].append("E")

for i in range(n):
    kari = que[i%4].popleft()
    que[(i+1)%4].append(kari)

for i in range(4):
    ans = "".join(que[i])
    print(ans)