using System;

public class Program

{

    public static void Main()

    {

    Console.WriteLine("for ciklus");

        for(int i=2; i<=44; i=i+2)

        {

        Console.Write(i);

        Console.Write(",");

        }

    Console.WriteLine(" ");

    Console.WriteLine(" ");

    Console.WriteLine("while ciklus");

        int j=2;

        while(j<=44) 

        {

        Console.Write(j);

        Console.Write(",");

        j=j+2;

        }

    Console.WriteLine(" ");

    Console.WriteLine(" ");

    Console.WriteLine("do-while ciklus");

        int k = 2;

        do{

        Console.Write(k);

        Console.Write(",");

        k=k+2;

        }while (k<=44);

    }

}