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

namespace _2.SoftUni_Water_Supplies
{
    class Program
    {
        static void Main()
        {
            double water = double.Parse(Console.ReadLine());
            List<double> bottles = Console.ReadLine().Split(' ').Select(double.Parse).ToList();
            long capacity = long.Parse(Console.ReadLine());
            var indexes = new List<int>();
            double initialQuantity = water;
            int currentIndex = water % 2 == 0 ? 0 : bottles.Count - 1;

            while (currentIndex != -1 && currentIndex < bottles.Count)
            {
                var bottleLiters = bottles[currentIndex];
                if (bottles[currentIndex] < capacity)
                {
                    bottles[currentIndex]+= capacity - bottleLiters;
                    water -= capacity - bottleLiters;
                    if (water < 0) { indexes.Add(currentIndex); }
                }
                currentIndex = initialQuantity % 2 == 0 ? ++currentIndex : --currentIndex;
            }
            if (water >= 0)
            {
                Console.WriteLine($"Enough water!\nWater left: {water}l.");
            }
            else
            {
                Console.WriteLine("We need more water!");
                Console.WriteLine($"Bottles left: {indexes.Count}");
                Console.WriteLine("With indexes: {0}", string.Join(", ", indexes));
                Console.WriteLine($"We need {Math.Abs(water)} more liters!");
            }
        }
    }
}