using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ConsoleApplication6

{

    class Program

    {

        static void Main(string[] args)

        {

            int s = 0, num = 80;

            while (s < num)

            {

                s++;

                    if(s>40)

                    {

                        break;

                    }

                if((s%2)==0)

                {

                    continue;

                }

                Console.WriteLine( s );

            }

            Console.ReadLine();

        }

    }

}