using System;

public class Soal2

{

    public static void Main()

    {   

        int i=1;

        while(i<4){

            Console.WriteLine(new String('*',i));

            i++;

        }

        int j=2;

        while(j>0){

            Console.WriteLine(new String('*',j));

            j--;

        }

​

    }

}