安迪的第一个字典 Andy's First Dictionary

题意翻译

输入一个文本，找出所有不同的单词（连续的字母序列），按字典序从小到大输出，单词不区分大小写。

题目描述

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=20&page=show_problem&problem=1756 [PDF](https://uva.onlinejudge.org/external/108/p10815.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10815/4f5c1d24c1c6cb6c76b70bd32c63daec8b95b2f4.png)

输入输出格式

输入格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10815/03acce165b96154650f2620dd40e5c6d60bd1a9f.png)

输出格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10815/a4a74f8b6cd346abca8f4ccf0d50b25e34c0aba2.png)

输入输出样例

输入样例 #1

Adventures in Disneyland
Two blondes were going to Disneyland when they came to a fork in the
road. The sign read: "Disneyland Left."
So they went home.

输出样例 #1

a
adventures
blondes
came
disneyland
fork
going
home
in
left
read
road
sign
so
the
they
to
two
went
were
when