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

namespace pj1
{
    class Program
    {
        bool check(int value)
            {
                if(value % 3 == 0 || (value >= 30 && value < 40) )
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }

        static void Main(string[] args)
        {
            Program program = new Program();
            string[] row = Console.ReadLine().Split();
            int A = int.Parse(row[0]);
            int B = int.Parse(row[1]);

            for (int number = A; number <= B;number++ )
            {
                if (program.check(number))
                {
                    Console.WriteLine(number);
                }
            }

        }
    }
}