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

namespace Sample_Exam_II___June_2016
{
    class Program
    {
        static void Main(string[] args)
        {
            double totalWater = double.Parse(Console.ReadLine());
            double[] bottles = Console.ReadLine().Split().Select(double.Parse).ToArray();
            double capacity = double.Parse(Console.ReadLine());

            int bottlesLeft = 0;
            double bottleDeficit = 0;
            bool even = true;

            if (totalWater % 2 == 0)
            {
                even = true;
                for (int bottle = 0; bottle < bottles.Length; bottle++)
                {
                    double bottleCapacity = bottles[bottle];
                    while (bottleCapacity < capacity)
                    {
                        if (totalWater <= 0)
                        {
                            bottlesLeft = bottles.Length - bottle;
                            bottleDeficit = capacity - bottleCapacity;
                            bottle++;
                            while (bottle < bottles.Length)
                            {
                                bottleCapacity = bottles[bottle];
                                bottleDeficit += capacity - bottles[bottle];
                                bottle++;
                            }
                            break;
                        }
                        if (capacity - bottleCapacity >= 1)
                        {
                            totalWater--;
                            bottleCapacity++;
                        }
                        else
                        {
                            totalWater -= capacity - bottleCapacity;
                            bottleCapacity = capacity;
                        }
                    }// end of while
                } // end of for
            } //end of if

            else
            {
                even = false;
                for (int bottle = bottles.Length - 1; bottle >= 0; bottle--)
                {
                    double bottleCapacity = bottles[bottle];
                    while (bottleCapacity < capacity)
                    {
                        if (totalWater <= 0)
                        {
                            bottlesLeft = bottle + 1;
                            bottleDeficit = capacity - bottleCapacity;
                            bottle--;
                            while (bottle >= 0)
                            {
                                bottleCapacity = bottles[bottle];
                                bottleDeficit += capacity - bottleCapacity;
                                bottle--;
                            }
                            break;
                        }
                        if (capacity - bottleCapacity >= 1)
                        {
                            totalWater--;
                            bottleCapacity++;
                        }
                        else
                        {
                            totalWater -= capacity - bottleCapacity;
                            bottleCapacity = capacity;
                        }
                    }// end of while
                }//end of for
            }//end of else

            int[] remainingBottlesIndexes = new int[bottlesLeft];

            if (even)
            {
                for (int bottle = bottlesLeft - 1; bottle >= 0; bottle--)
                {
                    remainingBottlesIndexes[bottle] = bottles.Length - bottle;
                }
                remainingBottlesIndexes = remainingBottlesIndexes.Reverse().ToArray();
            }
            else
            {

                for (int bottle = 0; bottle < bottlesLeft; bottle++)
                {
                    remainingBottlesIndexes[bottle] = bottle;
                }

                remainingBottlesIndexes = remainingBottlesIndexes.Reverse().ToArray();
            }


            if (bottlesLeft == 0)
            {
                Console.WriteLine("Enough water!");
                Console.WriteLine($"Water left: {totalWater}l.");
            }
            else
            {
                Console.WriteLine("We need more water!");
                Console.WriteLine($"Bottles left: {bottlesLeft}");
                Console.WriteLine("With indexes: " + string.Join(", ", remainingBottlesIndexes)); ;
                Console.WriteLine($"We need {bottleDeficit} more liters!");
            }
        }
    }
}