using System;

public class Program

{

    public static void Main()

    {

        Console.Write("x = ");

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

        for ( int i = 2; i < x ; i++)

        {

           if ( x % i == 0)

           {

           Console.WriteLine("Chisloto ne e prosto");

               break;

           }

             if ( i == x - 1)

              {

                    Console.WriteLine("Chisloto e prosto");

            }

       }   

   }

}