function partyTime(input){

        let vip = new Map();
        let regualer = new Map();

 while(input[0] !== 'PARTY'){

    for(let el of input){
        element = input.shift(el)
        let isValid = !isNaN(element[0])
        if(isValid){
            vip.set(element)
        }else{
            regualer.set(element)
        }
    }

}
input.forEach(element => {
    vip.delete(element)
    regualer.delete(element)
});
console.log(vip.size + regualer.size)
for (let el of vip){
    console.log(el[0])
}
for(let el of regualer){
    console.log(el[0])
}


}