using System;

namespace ThreeBrothers
{
    class Program
    {
        static void Main(string[] args)
        {
            double firstBroTime = double.Parse(Console.ReadLine());
            double secondBroTime = double.Parse(Console.ReadLine());
            double thirdBroTime = double.Parse(Console.ReadLine());
            double fishingTime = double.Parse(Console.ReadLine());

            double cleaningTime = 1 / (1 / firstBroTime + 1 / secondBroTime + 1 / thirdBroTime);
            double totalTime = cleaningTime + cleaningTime * 0.15;

            double timeLeft = Math.Abs(fishingTime - totalTime);
            Console.WriteLine("Cleaning time: {0:f2}", totalTime);

            if (fishingTime >= totalTime)
                Console.WriteLine($"Yes, there is a surprise - time left -> {Math.Floor(timeLeft)} hours.");
            else
                Console.WriteLine($"No, there isn't a surprise - shortage of time -> {Math.Ceiling(timeLeft)} hours.");

        }
    }
}