PROGRAMMING:Word order
###Description
Input a line of word sequence, the adjacent words are separated by one or more spaces, please output these words according to the dictionary order, the repeated words are only output once（ (case sensitive)
###Input
A line of word sequence, at least 1 word, at most 100 words, each word length is not more than 50, between words with at least 1 space interval. Data does not contain other characters except letters and spaces.
###Output
Output these words in dictionary order and repeat them only once.
###Sample input
```in
She wants to go to Peking University to study Chinese
```
###Sample output
```out
Chinese
Peking
She
University
go
study
to
wants
```
###Title Source
http://noi.openjudge.cn/ch0110/03/
answer：If there is no answer, please comment
Input a line of word sequence, the adjacent words are separated by one or more spaces, please output these words according to the dictionary order, the repeated words are only output once（ (case sensitive)
###Input
A line of word sequence, at least 1 word, at most 100 words, each word length is not more than 50, between words with at least 1 space interval. Data does not contain other characters except letters and spaces.
###Output
Output these words in dictionary order and repeat them only once.
###Sample input
```in
She wants to go to Peking University to study Chinese
```
###Sample output
```out
Chinese
Peking
She
University
go
study
to
wants
```
###Title Source
http://noi.openjudge.cn/ch0110/03/
answer：If there is no answer, please comment