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