const fn = require('./index.js');
const obj = fn.combine('12312sfasasas534')
console.log(obj.str1);//你输入的字符串为：12312sfasasas534
console.log(obj.str2);//去掉多余字符后的数组为：5,4,3,3,2,2,1,1
console.log(obj.str3);//重组后的数字为：54332211