输入一个手机号，先判断其合法性，如果合法再判断属于哪个运营商。手机号合法性：1. 输入的手机号正好11个数；2.输入的手机号都是数字
先定义一组不雅词数组，任意输入一段话，检测话里有几个不雅词。
What is the dialogue mostly about?
A. raising executive salaries
B. recording an accrued expense
C. creating a new expense account
D. settling last year’s expense accounts
According to the dialogue, bonuses are
A. the same every year.
B. given to accountants.
C. paid at the end of the year.
D. estimated according to sales.
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