using System;

public class Program

{

    public static void Main()

    {

            Console.WriteLine("Enter a number:");

            int n=Convert.ToInt32(Console.ReadLine());

        int i,j;

        int c=0;

        for(i=2;i<n;i++)

        {

            for(j=2;j<i;j++)

            {

                if(j%i==0)

                {

                    c++;

                }

            }

            if(c==2)

                Console.Write(j + " ");

        }

    }

}

​