function solve(input){
    let car ={
        model: input.model,
        engine: engineSpecs(input.power),
        carriage:{
            type: input.carriage,
            color: input.color
        },
        wheelsize:wheelSize(input.wheelsize)
    }
    return car;


    //determine engine volume
    function engineSpecs(power){
        if (power <= 90){
            return {power: 90, volume: 1800}
        }else if(input.power <= 120){
            return {power: 120, volume: 2400}
        }else {
            return {power: 200, volume: 3500}
        }
    }

    //determine wheelsize
    function wheelSize(d){
        if (d % 2 === 0){
            return [d - 1, d - 1, d - 1, d - 1];
        }
        return [d, d, d, d];
    }

}