[アルゴリズム]白準1181-(lambdaを用いたsort)

n = int(input())
word_list = []

for _ in range(n):
    word_list.append(input())

word_list = list(set(word_list))

word_list.sort(key=lambda x: (len(x), x))


for word in word_list:
    print(word)