题目描述

输入一行单词序列，相邻单词之间由1个或多个空格间隔，请按照字典序输出这些单词，要求重复的单词只输出一次。（区分大小写）

输入格式

一行单词序列，最少1个单词，最多100个单词，每个单词长度不超过50，单词之间用至少1个空格间隔。数据不含除字母、空格外的其他字符。

输出格式

按字典序输出这些单词，重复的单词只输出一次。

样例

输入样例 1

She wants to go to Peking University to study Chinese

输出样例 1

Chinese
Peking
She
University
go
study
to
wants

输入样例 2

Youth is not a time of life it is a state of mind

输出样例 2

Youth
a
is
it
life
mind
not
of
state
time

输入样例 3

I'd rather share one lifetime with you

输出样例 3

I'd
lifetime
one
rather
share
with
you