task

package CarSalesMan;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = Integer.parseInt(sc.nextLine());

        String input = sc.nextLine();

        List<Engine> engineList = new ArrayList<>();

        for (int i = 0; i < n; i++) {
            String[] tokens = input.split(" ");

            Engine engine = new Engine();

            engine.setModel(tokens[0]);
            engine.setPower(Integer.parseInt(tokens[1]));

            if (tokens.length==3 && isLetter(tokens[2])){
                engine.setDisplacement("n/a");
                engine.setEfficiency(tokens[2]);
            } else if (tokens.length==3 && !isLetter(tokens[2])){
                engine.setDisplacement(tokens[2]);
                engine.setEfficiency("n/a");
            } else if (tokens.length==4){
                engine.setDisplacement(tokens[2]);
                engine.setEfficiency(tokens[3]);
            } else{
                engine.setDisplacement("n/a");
                engine.setEfficiency("n/a");
            }

            engineList.add(engine);

            if (i==n-1){
                break;
            } else{
                input = sc.nextLine();
            }
        }

        int num = Integer.parseInt(sc.nextLine());

        String otherInput = sc.nextLine();

        List<Car> carList = new ArrayList<>();

        for (int i = 0; i < num; i++) {
            String[] tokens = otherInput.split(" ");

            Car car = new Car();

            car.setModel(tokens[0]);
            car.setEngine(tokens[1]);

            if (tokens.length==3 && isLetter(tokens[2])){
                car.setWeight("n/a");
                car.setColor(tokens[2]);
            } else if (tokens.length==3 && !isLetter(tokens[2])){
                car.setWeight(tokens[2]);
                car.setColor("n/a");
            } else if (tokens.length==4){
                car.setWeight(tokens[2]);
                car.setColor(tokens[3]);
            } else{
                car.setWeight("n/a");
                car.setColor("n/a");
            }

            carList.add(car);

            if (i==n){
                break;
            } else{
                otherInput = sc.nextLine();
            }
        }

        for (Car iterate1 : carList) {
            String currentCarEngine = iterate1.getModel();
            System.out.println(currentCarEngine+":");

            for (Engine iterate : engineList) {
                String currentEngine = iterate.getModel();
                if (iterate1.getEngine().equals(currentEngine)){
                    System.out.println(iterate1.getEngine()+":");
                    System.out.printf("Power: %d%n",iterate.getPower());
                    System.out.printf("Displacement: %s%n",iterate.getDisplacement());
                    System.out.printf("Efficiency: %s%n",iterate.getEfficiency());
                    System.out.printf("Weight: %s%n",iterate1.getWeight());
                    System.out.printf("Color: %s%n",iterate1.getColor());
                }
            }
        }
    }
    private static boolean isLetter(String token) {
        char symb = token.charAt(0);
        if (Character.isLetter(symb)){
            return true;
        }
        return false;
    }
}