function piccolo(input) {
    let parkingLIst = new Map()

    let carLine = input.map(el => el.split(', '))
        .forEach(el => {
            if (el[0] === "IN") { parkingLIst.set(el[1], el[0]) }
            else if (el[0] === 'OUT') { parkingLIst.delete(el[1]) }
        })
        Array.from(parkingLIst)
        .sort((a, b) => a[0].localeCompare(b[0]))
        .forEach(x => console.log(x[0]));
}