using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _07.Primes_in_Given_Range
{
    class Program
    {
        static void Main(string[] args)
        {
            int startNum = int.Parse(Console.ReadLine());
            int endNum = int.Parse(Console.ReadLine());
            Console.WriteLine(string.Join(", ", FindPrimesInRange(startNum, endNum).ToList()));

        }
        static List<int> FindPrimesInRange(int startNum, int endNum)
        {
            List<int> Primes = new List<int>();


            while (startNum <= endNum)
            {
                bool IsPrime = true;
                double squareRoot = (int)Math.Floor(Math.Sqrt(startNum));
                if (startNum < 2)
                {
                    IsPrime = false;
                }
                for (int i = 2; i <= squareRoot; i++)
                {
                    if (startNum % i == 0)

                    {
                        IsPrime = false;
                    }

                }
                if(IsPrime)
                {
                    Primes.Add(startNum);
                }
                startNum++;
            }
            return Primes;
        }
    }
}