题解 | #查找兄弟单词#

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function () {
    let line= (await readline()).split(' ');
    let arr=line.slice(1,line.length-2);
    let word=line[line.length-2]
    let k=line[line.length-1]

    let num=0;
    let res=[];
    for(let i=0;i<arr.length;i++){
        if(simiword(arr[i],word)){
            num++;
            res.push(arr[i])
        }
    }

    res.sort();

    console.log(num);
    if(num!=0 && res[k-1]){
        console.log(res[k-1]);
    }
    
   
    

}()


function simiword(unKnowWord,word){
    if(unKnowWord==word){
        return 0;
    }
    let unKnowWord1=unKnowWord.split('');
    let word1=word.split('');
    if(unKnowWord1.length != word1.length){
        return 0;
    }
    for(let i=0;i<word1.length;i++){
        unKnowWord=unKnowWord.replace(word1[i],'');
    }
    if(unKnowWord != ''){
        return 0;
    }
    return 1;
}

function simiword(unKnowWord, word) {
    if (unKnowWord == word) {
        return 0;
    }
    unKnowWord = unKnowWord.split('').sort().join('');
    word = word.split('').sort().join('');

    if (unKnowWord == word) {
        return 1;
    } else {
        return 0;
    }
}