[PS] 정렬: 1181 단어정렬

import sys

fast_input = sys.stdin.readline
def fast_print(v):
    sys.stdout.write(v)


N = int(fast_input())
word_list = []
for _ in range(N):
    word_list.append(fast_input())

word_list=list(set(word_list))
word_list.sort()
word_list.sort(key=len)
for word in word_list:
    fast_print(word)