using System;

public class Program

{

    public static void Main()

    {

        int count = 2;

        while (count <= 100)

        {

            int div = 0;

            int i = 1;

            while (i < count) 

            {   

                if (count % i == 0)

                {

                    div ++;

                }

                i ++; 

            }

            if (div == 1)

            {

                Console.WriteLine(count);

            }

            count ++;

        }

    }

}