using System;

public class Program

{

    public static void Main()

    {

        int n1 = 0;

        int x ;

        Console.WriteLine("numero 1");          

      n1=Convert.ToInt32(Console.ReadLine());

            int mult = n1 *3;

        for ( x = n1; x <= mult; x++)

    {       

        Console.WriteLine("a " + x);

        }

    }       

}