题解 | #字符串加密#

while(line = readline()){
    let str = readline();
    let set = new Set();
    let res = []
    line = line.toUpperCase() + "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    line.split("").forEach((ele)=>{
        set.add(ele);
    })
    let key = new Array(...set);
    str.split("").forEach((ele)=>{
        if(/[A-Z]/g.test(ele)){
            res.push(key[ele.charCodeAt(0)-97])
        }else{
            res.push(key[ele.charCodeAt(0)-97].toLowerCase());
        }
    })
    console.log(res.join(''));
}