from collections import deque
q = [deque([]) for i in range(4)]

S = "ABCDE"
for i in range(5):
    q[i % 4].append(S[i])
    
K = int(input())
for i in range(K):
    q[(i + 1) % 4].append(q[i % 4].popleft())
    
for qq in q:
    print("".join(list(qq)))