from collections import defaultdict, deque
from pickletools import read_decimalnl_long
import sys
readline=sys.stdin.readline
write=sys.stdout.write
import itertools

queue=[["A","E"],["B"],["C"],["D"]]
for i in range(4):
    queue[i]=deque(queue[i])
K=int(readline())
for i in range(K):
    queue[(i+1)%4].append(queue[i%4].popleft())
for i in range(4):
    print(*queue[i],sep="")