ReadBooks

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

namespace Exams_26AprilMorning
{
    class ReadBook
    {
        static void Main(string[] args)
        {
            int pagesOfBook = int.Parse(Console.ReadLine());
            int campingDays = int.Parse(Console.ReadLine());
            int pagesReadStefan = int.Parse(Console.ReadLine());

            int month = 30;
            int year = 12;

            double leftReadDays = month - campingDays;
            double readPerMonth = leftReadDays * pagesReadStefan;
            double needTimeForReading = pagesOfBook / readPerMonth;
            double inYears = needTimeForReading / year;



            if (campingDays == month || pagesReadStefan == 0)
            {
                Console.WriteLine("never");
            }
            else if (needTimeForReading < 12)
            {

                Console.WriteLine($"0 years {Math.Ceiling(needTimeForReading)} months");
            }
            else
            {
                double leftMonths = needTimeForReading % 12;


                Console.WriteLine($"{(int)inYears} years {Math.Ceiling(leftMonths)} months");

            }


        }
    }
}