function y(params = []) {
    let betterInput = params.slice(0, params.indexOf('start of concert'));
    let bands = {};
    let playtime = {};
    let totalPlaytime = 0;

    for (const line of betterInput) {
        let [command, bandName, value] = line.split('; ');

        switch (command) {
            case 'Add':
                let members = value.split(', ');
                if (!bands.hasOwnProperty(bandName)) {
                    bands[bandName] = [];
                    for (let i = 0; i < members.length; i++) {
                        if (!bands[bandName].includes(members[i])) {
                            bands[bandName].push(members[i])
                        }
                    }
                } else {
                    for (let index = 0; index < members.length; index++) {
                        if (!bands[bandName].includes(members[index])) {
                            bands[bandName].push(members[index])
                        }
                    }
                }
                break;

            default:
                let timeOnStage = +value;
                totalPlaytime += timeOnStage;
                if (!playtime.hasOwnProperty(bandName)) {
                    playtime[bandName] = 0;
                }
                playtime[bandName] += timeOnStage;
                break;
        }

    }

    console.log(`Total time: ${totalPlaytime}`);

    let playtimeArr = Object
        .entries(playtime)
        .sort((a, b) => b[1] - a[1] || a[0].localeCompare(b[0]))
        .forEach(member => {
            console.log(`${member[0]} -> ${member[1]}`);
        });


    let bandMembers = Object
        .entries(bands)
        .sort((a, b) => b[0].length - a[0].length);

    let finalBand = params.pop();

    console.log(finalBand);

    bands[finalBand].forEach(member => {
        console.log(`=> ${member}`);
    })
}