Have you seen the cartoons of two penguins(企鹅) on the Internet? They sit on either side of a small 1. They are friends, but each does something selfish（自私的）which 2 their friend “ship” to sink(沉没).

    The cartoons have become very 3. It shows how much people value friendship and sometimes 4 they may lose their friends. A friend is someone you can share your happy and 5 moments with. A friend is someone to talk to about your deepest feelings. And with a good friend you will never be alone.

    However, keeping friendship isn't always 6. The key to 7 your friend “ship” from sinking comes down to three simple things: sharing, caring and communicating. Good friends like to share everything with each other. They share their snacks, they share their 8about schoolwork, sometimes they even share their clothes! And good friends also care about each other. They do 9 they can to make their friends happy. But the most important part of friendship is communicating.

    Communicating means talking to your friends and being honest with them. It also means that you keep in touch with your friends even though they may be in 10 schools or live far away. Without communication, it is sure to send your friend “ship” to sink into the sea.

阅读下面的文言文，回答后面问题。

   陈尧咨善射，百发百中，世以为神，常自号曰“小由基^①”。及守荆南回，其母冯夫人问：“汝典郡^②有何异政？”尧咨云：“荆南当要冲，日有宴集，尧咨每以弓矢为乐，坐客罔不叹服。”母曰：“汝父教汝以忠孝辅国家，今汝不务行仁化而专一夫之伎^③，岂汝先人志邪？”杖之，碎其金鱼^④。

【注】①由基：养由基，战国时楚国神箭手。②典郡：掌管郡务。③伎：通假字，同“技”。④金鱼：古人的一种佩饰。

执行如图所示的程序框图．若输出的结果为﹣1，则可以输入的x的个数为（　　）