电话的号码盘一般可以用于输入字母，使用数据结构及查找相关算法解决，利用电话号码对应单词，得到简单的拼音输入，这种输入还要求有一定的容错功能-Phone number plate can generally be used to enter letters, use the data structure and search algorithm to solve related to the use of telephone numbers corresponding to words, to be a simple phonetic input, this type also requires a certain degree of fault tolerance