Catenyms

题目描述

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=16&page=show_problem&problem=1382 [PDF](https://uva.onlinejudge.org/external/104/p10441.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10441/eb0df29e506ad7b79a2a1261b236ecf3f0b7da40.png)

输入输出格式

输入格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10441/0c0f7a1c0f3c5745c71d08b57c2a8dbacb3f916f.png)

输出格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10441/befc43c5954d0bd5d4a50ee2389a929f3041976c.png)

输入输出样例

输入样例 #1

2
6
aloha
arachnid
dog
gopher
rat
tiger
3
oak
maple
elm

输出样例 #1

aloha.arachnid.dog.gopher.rat.tiger
***