async function task(url) {

    var r1 = await fetch(url).then(resp => resp.text());

    var r2 = await fetch(url + "/" + r1).then(resp => resp.json());

    //r2 is an array of urls

    var total = 0;
    for (var u of r2) {
        tmp = await fetch(u).then(resp => resp.text());
        total += parseInt(tmp)
    }
    return total
}