using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
    static void Main()
    {
        var totalAmountOfWater = int.Parse(Console.ReadLine());
        decimal[] itemsInTheArray = Console.ReadLine().Split(' ').Select(decimal.Parse).ToArray();
        int bottleCapacity = int.Parse(Console.ReadLine());
        var bottlesLeft = 0;
        var indexesOfLeftBottles = new List<int>();

        decimal litersFilled = 0;
        if (totalAmountOfWater % 2 == 0)
        {
            for (int i = 0; i < itemsInTheArray.Length; i++)
            {
                litersFilled += bottleCapacity - itemsInTheArray[i];
                if (litersFilled > totalAmountOfWater)
                {
                    bottlesLeft++;
                    indexesOfLeftBottles.Add(i);
                }
            }
        }
        else
        {
            for (int i = itemsInTheArray.Length - 1; i >= 0; i--)
            {
                litersFilled += bottleCapacity - itemsInTheArray[i];
                if (litersFilled > totalAmountOfWater)
                {
                    bottlesLeft++;
                    indexesOfLeftBottles.Add(i);
                }
            }
        }
        if (litersFilled > totalAmountOfWater)
        {
            Console.WriteLine("We need more water!");
            Console.WriteLine($"Bottles left: {bottlesLeft}");
            Console.WriteLine($"With indexes: {string.Join(", ", indexesOfLeftBottles)}");
            Console.WriteLine($"We need {litersFilled - totalAmountOfWater} more liters!");
        }
        else
        {
            Console.WriteLine("Enough water!");
            Console.WriteLine($"Water left: {totalAmountOfWater - litersFilled}l.");
        }
    }
}