[프로그래머스] lv2 튜플

function solution(s) {
    var ans = [];
    let ns = s
    .substring(2, s.length-2)
    .split('},{')
    .map(a => a.split(','))
    .sort((a,b) => (a.length - b.length));
    for(let i = 0; i < ns.length; i++){
        for(let j = 0; j < ns[i].length; j++){
            if(!ans.includes(ns[i][j])){
                ans.push(ns[i][j]);
                break;
            }            
        }
    }
    return ans.map(a => parseInt(a));
}