k =int(input())
from collections import deque
s = ["A","B","C","D","E"]
l = [deque() for _ in range(4)]
for i in range(5):
    l[i%4].append(s[i])
for i in range(k):
    l[(i+1)%4].append(l[i%4].popleft())
for i in l:
    print("".join(list(i)))