Exam Jan-2016 - 11. Increasing 4 Numbers

/**
 * Project: Exam_101_January_2016 - created by borkins on 2017-05-03.
 */

import java.util.Scanner;

public class _11_IncreasingFourNumbers
{
    public static void main(String[] args)
    {
        Scanner console = new Scanner(System.in);

        int a = Integer.parseInt(console.nextLine());
        int b = Integer.parseInt(console.nextLine());

        int n1;
        int n2 = a + 1;
        int n3 = a + 2;
        int n4 = a + 3;

        if (Math.abs(a - b) >= 3)
        {
            for (n1 = a; n1 <= n2 - 1; n1++)
            {
                for (n2 = n1 + 1; n2 <= n3 - 1; n2++)
                {
                    for (n3 = n2 + 1; n3 <= n4 - 1; n3++)
                    {
                        for (n4 = n3 + 1; n4 <= b; n4++)
                        {
                            System.out.printf("%d %d %d %d%n", n1, n2, n3, n4);
                        }
                    }
                }
            }
        }
        else {
            System.out.println("No");
        }
    }
}