06. Substitute

package PodgotovkaZaIzpit;

import java.util.Scanner;

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

        int k = Integer.parseInt(scanner.nextLine());
        int l = Integer.parseInt(scanner.nextLine());
        int m = Integer.parseInt(scanner.nextLine());
        int n = Integer.parseInt(scanner.nextLine());
        int counter = 0;

        for (int i = k; i <= 8; i++)
        {
            if (i % 2 == 1) { continue; }
            for (int o = 9; o >= l; o--)
            {
                if (o % 2 == 0) { continue; }
                for (int p = m; p <= 8; p++)
                {
                    if (p % 2 == 1) { continue; }
                    for (int q = 9; q >= n; q--)
                    {
                        if (q % 2 == 0)
                        {
                            continue;
                        }

                        if (i == p && o == q)
                        {

                            System.out.println("Cannot change the same player.");

                        }
                        else
                        {
                            counter++;
                            System.out.printf("%d%d - %d%d\n",i, o, p, q );


                        }
                        if (counter == 6) {return; }

                    }



                }
            }
        }
    }

    }