using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        double amountOfWater = double.Parse(Console.ReadLine());
        double[] bottles = Console.ReadLine().Split().Select(double.Parse).ToArray();
        double bottleCapacity = double.Parse(Console.ReadLine());
        int indexOfLastFullBottle = 0;
        double neededWater = 0;

        if (amountOfWater%2 == 0) //Starts from left to right
        {
            EvenWater(ref amountOfWater, bottles, bottleCapacity, ref indexOfLastFullBottle, ref neededWater);
        }

        else // starts from the end
            OddWater(ref amountOfWater, bottles, bottleCapacity, ref indexOfLastFullBottle, ref neededWater);
    }

    private static void OddWater(ref double amountOfWater, double[] bottles, double bottleCapacity,
        ref int indexOfLastFullBottle, ref double neededWater)
    {
        for (int i = bottles.Length - 1; i >= 0; i--)
        {
            double currentBottle = Math.Abs(bottleCapacity - (int) bottles[i]);
            amountOfWater = amountOfWater - currentBottle;

            if (amountOfWater >= 0)
            {
                indexOfLastFullBottle = i;
            }
            else if (amountOfWater < 0)
            {
                neededWater = -amountOfWater;
                if (i != 0)
                {
                    for (int j = indexOfLastFullBottle - 1; j >= 0; j--)
                    {
                        neededWater += (bottleCapacity - (int) bottles[j]);
                    }
                }
            }
        }
        if (amountOfWater >= 0)
        {
            Console.WriteLine("Enough water!");
            Console.WriteLine("Water left: {0}l.", amountOfWater);
        }
        else
        {
            List<int> EmptyBottles = new List<int>();
            for (int i = indexOfLastFullBottle - 1; i >= 0; i--)
            {
                EmptyBottles.Add(i);
            }
            Console.WriteLine("We need more water!");
            Console.WriteLine("Bottles left: {0}", indexOfLastFullBottle);
            Console.WriteLine("With indexes: " + string.Join(", ", EmptyBottles));
            Console.WriteLine("We need {0} more liters!", neededWater);
        }
    }

    private static void EvenWater(ref double amountOfWater, double[] bottles, double bottleCapacity,
        ref int indexOfLastFullBottle, ref double neededWater)
    {
        for (int i = 0; i < bottles.Length; i++)
        {
            double currentBottle = Math.Abs(bottleCapacity - bottles[i]);
            amountOfWater = amountOfWater - currentBottle;

            if (amountOfWater >= 0)
            {
                indexOfLastFullBottle = i;
                neededWater = (bottles.Length - 1 - indexOfLastFullBottle)*bottleCapacity;
            }
            else if (amountOfWater < 0)
            {
                indexOfLastFullBottle = i - 1;
                neededWater = -amountOfWater;
                break;
            }
        }
        if (amountOfWater >= 0)
        {
            Console.WriteLine("Enough water!");
            Console.WriteLine("Water left: {0}l.", amountOfWater);
        }
        else
        {
            List<int> EmptyBottles = new List<int>();
            for (int i = 0; i < indexOfLastFullBottle; i++)
            {
                EmptyBottles.Add(i);
            }
            Console.WriteLine("We need more water!");
            Console.WriteLine("Bottles left: {0}", bottles.Length - 1 - indexOfLastFullBottle);
            Console.WriteLine("We need {0} more liters!", neededWater);
        }
    }
}