function solve(vignettes) {
    let towns = [];

    vignettes.forEach(x => {
        let currentTown = towns.find(a => a.townName === x.town);
        if (!currentTown) {
            currentTown = {
                townName: x.town,
                registerVignets: 1,
                profit: x.price,
                cars: []
            };
            towns.push(currentTown);
        } else {
            currentTown.registerVignets++;
            currentTown.profit += x.price;
        }

        let currentCar = currentTown.cars.find(a => a.model === x.model);

        if (!currentCar) {
            currentCar = {
                model: x.model,
                registeredCars: 1,
                highiestPrice: x.price,
                plates: []
            };
            currentCar.plates.push(x.regNumber);
            currentTown.cars.push(currentCar);
        } else {
            currentCar.registeredCars++;
            currentCar.plates.push(x.regNumber);
            if (currentCar.highiestPrice < x.price) {
                currentCar.highiestPrice = x.price;
            }
        }
    });
    towns = towns.sort((a, b) => b.profit - a.profit
        || b.registerVignets - a.registerVignets
        || a.townName.localeCompare(b.townName));

    let mostProfitableTown = towns[0];

    mostProfitableTown.cars = mostProfitableTown.cars.sort((a, b) =>
           b.registeredCars - a.registeredCars
        || b.highiestPrice - a.highiestPrice
        || a.model.localeCompare(b.model));

    console.log(`${mostProfitableTown.townName} is most profitable - ${mostProfitableTown.profit} BGN`);

    let bestCar = mostProfitableTown.cars[0];
    console.log(`Most driven model: ${bestCar.model}`)

    let result = towns.filter(x => x.cars.some(a => a.model === bestCar.model)).filter((x => x))
        .map(x => {
            return {
                townName: x.townName,
                plates: x.cars.filter(z => z.model === bestCar.model)
                    .map(g => g.plates
                        .sort((a, b) => a.localeCompare(b))
                        .join(', '))
            }
        });
    result.forEach(x => {
        console.log(`${x.townName}: ${x.plates}`)
    });
}