Pizza Anyone?

题意翻译

要给朋友们订一份披萨，每个人喜好不同，列出了朋友们对披萨的要求，+A代表喜欢A口味，-A代表讨厌A口味，只需要满足每个朋友的一种需求就可以，然后输出披萨放的全部口味，否则输出 ```No pizza can satisfy these requests.```

题目描述

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=7&page=show_problem&problem=506 [PDF](https://uva.onlinejudge.org/external/5/p565.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA565/660a4a6dee0ec03ea5eb9b6eeee2224fb2816c13.png)

输入输出格式

输入格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA565/23b0e597b3ff42aa821f9949b3bdf12bdc23e316.png)

输出格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA565/85189fe71d19890bbb09808be44056081dc5ec1f.png)

输入输出样例

输入样例 #1

+A+B+C+D-E-F-G-H;
-A-B+C+D-E-F+G+H;
-A+B-C+D-E+F-G+H;
.
+A+B+C+D;
+E+F+F+H;
+A+B-G;
+O+J-F;
+H+I+C;
+P;
+O+M+L;
+M-L+P;
.
+A+B+C+D;
+E+F+F+H;
+A+B-G;
+P-O;
+O+J-F;
+H+I+C;
+P;
+O;
+O+M+L;
-O-P;
+M-L+P;
.

输出样例 #1

Toppings:
Toppings: CELP
No pizza can satisfy these requests.