"""

"""

import sys
from sys import stdin

K = int(stdin.readline())

a = [ ["A","E"] , ["B"] , ["C"] , ["D"] ]

for i in range(K):

    x = a[i % 4][0]
    del a[i % 4][0]

    a[(i+1) % 4].append(x)

for i in a:
    print ("".join(i))