const readline = require("readline"); const rl = readline.createInterface({ input: process.stdin, output: process.stdout, }); rl.on("line", function (line) { // 字符串切片,同split('') let res = Array.from(line); // 过滤其他字符,将字母原地排序 let lineCopy = Array.from(line.replace(/[^a-z]/gim, "")).sort((a, b) => {...