数字寻呼机用数字编码表示姓氏，例如101代表“李”、180代表“曾”、181代表“谢”等。试编写一个应用程序管理数字寻呼台的姓氏代码本，允许用户添加新的姓氏代码，删除无用的姓氏代码，浏览代码本或将用户输入的代码翻译为相应的姓氏。（提示：应将一个代码及其对应的姓氏抽象为一个类Item，而姓氏代码本CodeBook则由若干Item的对象实例组成。）

-Numerically coded representation of the numeric pager surname, for example 101 represents "Lee", 180 on behalf of "Yes", 181 means "thank" and so on. Try to write an application managing digital paging code for this surname, surname allow users to add new code, delete unwanted surnames code, browse the code of the code or to translate user input to the corresponding name. (Hint: should be a code name and its corresponding abstract as a class Item, and surnames code from the CodeBook certain Item object instances.)