using System;

public class Program

{

    public static void Main()

    {

        int adee, adee2, sum, count;

        Console.WriteLine("enter natural number");

        adee = int.Parse(Console.ReadLine());

        Console.WriteLine("enter second natural number");

        adee2 = int.Parse(Console.ReadLine());

        sum= adee*adee2;

        count=0;

        while (sum <= adee)

        {

            Console.WriteLine(count);

            count=adee + adee;

        }

    }

}