using System;
using System.Linq;
using System.Collections.Generic;
namespace BombNumbers
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> numbers = Console.ReadLine().Split().Select(int.Parse).ToList();
            string line = Console.ReadLine();
            int bomb = int.Parse(line.Split()[0]);
            int power = int.Parse(line.Split()[1]);
            while (numbers.Contains(bomb))
            {
                int bombIndex = numbers.IndexOf(bomb);
                int startIndex = bombIndex - power;

                if (startIndex < 0)
                {
                    break;
                }

                if (bombIndex + power >= numbers.Count)
                {
                    numbers.RemoveRange(startIndex, numbers.Count - startIndex);
                }
                else
                {
                    int endIndex = bombIndex + power;
                    int count = endIndex - startIndex + 1;
                    numbers.RemoveRange(startIndex, count);
                }


            }
            Console.WriteLine(numbers.Sum());
        }
    }
}