Largest Three Rectangles

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


public class LargestThreeRectangles {

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

        String inputRectangles = input.nextLine();
        String[] rectangles = inputRectangles.split("\\D+");

        ArrayList<Integer> areas = new ArrayList<Integer>();

        for (int i = 1; i < rectangles.length; i += 2) {
            int firstSide = Integer.parseInt(rectangles[i]);
            int secondSide = Integer.parseInt(rectangles[i + 1]);
            areas.add(firstSide * secondSide);
        }

        int currentArea = 0;
        int maxArea = 0;

        for (int i = 0; i < areas.size() - 2; i++) {
            currentArea = areas.get(i) + areas.get(i + 1) + areas.get(i + 2);

            if (currentArea > maxArea) {
                maxArea = currentArea;
            }
        }

        System.out.println(maxArea);
    }

}