function solve(input = []) {
    let splitting = input.shift().split(`!`);
    let commands = input.shift();

    while (commands !== 'Go Shopping!') {
        let tokens = commands.split(' ');
        let command = tokens[0];
        let item = tokens[1];

        if (command === 'Urgent') {
            if (item === splitting[0]) {
                break;
            }

            else {
                splitting.unshift(item);
            }
        }
    }
    console.log(splitting);
}