using System;

public class Program

{

    static bool isPrime(int x) {

        // bool is a boolean type that has value of true/false

        // please implement this method

        int i;

        for (i = 2;i<=x/2;i++){

            if (x%i==0) 

                return false;

        }

        return true;

    }

    public static void Main()

    {

        int y;

        for (y=2;y<=500;y++)

        {

            if (isPrime(y))

                Console.WriteLine("{0} ",y);

        }

        // please implement this program        

    }

}