题解 | new Set() 对数组去重并保留原有顺序

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

void async function () {
    // Write your code here
    let key = await readline()
    let str = await readline()
    let line = 'abcdefghijklmnopqrstuvwxyz'
    let pswStr = [...new Set(key + line)]
    
    let res = ''
    str.split('').forEach(el => {
        res += pswStr[line.indexOf(el)]
    })
    console.log(res)
}()