function houseParty(arr) {

    let list = [];
    let guestName = ''

    for (let i = 0; i < arr.length; i++) {
        let name = arr[i];



        for (let j = 0; j < name.length; j++) {
            let element = name.split(" ");
            let guestName = element[0];

            if (name[2] !== 'not') {
                list.push(guestName);
                name = arr[i];
            } else {
                console.log(`${guestName} is not in the list!`);
            }

            if (list.includes(guestName) === true) {
                console.log(`${guestName} is already in the list!`);
            }


        }






        console.log(list.join('\n'));

    }
}



houseParty(['Tom is going!', 'Annie is going!', 'Tom is going!', 'Garry is going!', 'Jerry is going!']);
houseParty(['Allie is going!', 'George is going!', 'John is not going!', 'George is not going!'])