function party(input) {
    let index = input.indexOf('PARTY');
    let list2 = input.splice(index + 1);
    let party = input.pop();
    //console.log(list2);

    for (let i = 0; i < list2.length; i++) {
        if (input.includes(list2[i])) {
            //console.log(list2[i]);
            let Index = input.indexOf(list2[i]);
            input.splice(Index, 1)
        } else {
            break;
        }

    }
    let result = input.sort((a, b) => a - b);

    console.log(result.length);
    console.log(result.join('\n'));

}