task 2.1 - mid exam

function sequence(array) {
    let list = array.shift().split(' ').map(Number);
    let listLength = list.length
    for (let command of array) {
        let token = command.split(' ');

        if (token[0] === 'Add') {
            list.push(Number(token[1]));
        }
        else if (token[0] === 'Remove') {
            let value = Number(token[1]);
            if (list.includes(value)) {
                list.splice(list.indexOf(value), 1);

            }
        } else if (token[0] === 'Replace') {
            let value = Number(token[1]);
            let replacement = Number(token[2]);
            if (list.includes(value)) {
                list.splice(list.indexOf(value), 1, replacement);
            }
        } else if (token[0] === 'Collapse') {
            let value = Number(token[1]);

            for (let i = 0; i < listLength; i++) {

                if (list[i] < value) {
                    list.splice(list.indexOf(list[i]), 1)
                }
            }
        } else if (token[0] === 'Finish') {
            console.log(list.join(' '));
        }

    }

}