import sys
#input = sys.stdin.readline #文字列につけてはダメ
input = sys.stdin.buffer.readline #文字列につけてはダメ
#sys.setrecursionlimit(1000000)
#import bisect
#import itertools
#import random
#from heapq import heapify, heappop, heappush
#from collections import defaultdict
from collections import deque
#import copy


def main():
    N = int(input())
    Q = []
    Q.append('AE')
    Q.append('B')
    Q.append('C')
    Q.append('D')
    for i in range(N):
        old = Q[i%4]
        Q[i%4] = old[1:]
        p = old[0]
        Q[(i+1)%4] += p
    print(*Q,sep='\n')
if __name__ == '__main__':
    main()