在电话语音识别中需要识别电话号码，这需要识别0到9十个数字，而识别前首先需要训练这十个数字，请编写程序设计一个电话号码表，要求数字组数最少。其中：每一组数字都是八位（例如：62781707），0到9十个数字中每两个数字之间至少连接一次（象62781707，其中出现了：6－2、2－7、7－8、8－1、1－7、7－0、0－7七个连接，7－0和0－7是不同的连接），0－0、1－1、......、9－9的连接也要考虑。每个数字在开头、结尾至少各出现一次（象62781707，其中6在开头出现一次，7在结尾出现一次）。-Telephone speech recognition need to identify phone numbers, which need to identify the ten numbers 0 to 9, while the identification of training needs before the first of these ten numbers, please write a program to design a phone number list, required the least number of digital group. Of which: each group of numbers are eight (example: 62781707), the ten numbers 0 to 9 for each connection at least once between the two figures (as 62,781,707, of which there :6-2 ,2-7, 7- 8,8-1,1-7,7-0,0-7 7 Connection ,7-0 and 0-7 is a different connection) ,0-0 ,1-1 ,......, 9-9 connections have to consider. Each number at the beginning, at the end of each appear at least once (as 62,781,707, of which 6 appear once in the beginning, 7 at the end there once).