import sys
input = lambda: sys.stdin.readline().rstrip()
from collections import deque

##################

k = int(input())

q = [deque(['A','E']), deque(['B']), deque(['C']), deque(['D'])]

for i in range(k):
  v = q[i%4].popleft()
  q[(i+1)%4].append(v)

for i in range(4):
  print(''.join(map(str, q[i])))