function solve(input){

    //determine engine volume
    let enginePower = 200;
    let engineVolume = 3500;
    if (input.power <= 90){
        enginePower = 90;
        engineVolume = 1800;
    }else if(input.power <= 120){
        enginePower = 120;
        engineVolume = 2400;
    }

    //determine wheelsize
    let wheel = wheelSize(input.wheelsize);
    function wheelSize(d){
        let res = d;
        if (d % 2 === 0){
            return res = d - 1;
        }
        return res;
    }


    let car ={
        model: input.model,
        engine: {
            power: enginePower,
            volume: engineVolume
        },
        carriage:{
            type: input.carriage,
            color: input.color
        },
        wheelsize:[wheel, wheel, wheel, wheel]
    }

    return car;

}



console.log(solve({
    model: 'Brichka',
    power: 65,
    color: 'white',
    carriage: 'hatchback',
    wheelsize: 16
}
));