using System;

public class Program

{

    public static void Sidra(int num,int hl)

    {

        for(int i=1;i<=hl;i++);

        {

        for (int z=1; z<=i ; z++)

       {

        Console.Write(num);

        num++;

        }

         num=1;

         Console.WriteLine("");

        }

    }

    public static void Main()

    {

        int n=1;

        int hl=4;

        Sidra(n,hl);

    }

}