using System;

using System.Threading;

public class Program

{

    public static void alpha()

    {   Random r=new Random();

        Char[] alp=new Char[]{'a','b','c','d','e'};

        for(int i=0;i<=4;i++)

        {

        Console.Write(alp[r.Next(0,4)]);

        Thread.Sleep(1);

        }

    }

    public static void number()

    {   Random r=new Random();

     for(int i=0;i<=9;i++)

     {

        Console.Write(r.Next(0,9));

        Thread.Sleep(1);

     }  

    }

    public static void Main()

    {

        Thread t1=new Thread(new ThreadStart(alpha));

        Thread t2=new Thread(new ThreadStart(number));

        t1.Start();

        t2.Start();

    }

}