题解 | #查找兄弟单词#

const readline = require("readline");

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
});
rl.on("line", function (line) {
    let arr = line.split(" ");
    const num = Number(arr[0]);
    const x = arr[num + 1];
    const sortedX = x.split("").sort().join("");
    const index = arr[num + 2];
    let words = arr.slice(1, num + 1);
    let brothers = [];
    function isBrother(word) {
        if (word.length !== x.length || word === x) return false;
        return word.split("").sort().join("") === sortedX;
    }
    words.forEach((w) => isBrother(w) && brothers.push(w));
    brothers.sort();
    console.log(brothers.length);
    console.log(brothers[index-1]||'')
});