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

namespace _5.Bomb_Numbers
{
    class Program
    {
        static void Main()
        {
            List<int> nums = Console.ReadLine().Split().Select(int.Parse).ToList();
            List<int> bomb = Console.ReadLine().Split().Select(int.Parse).ToList();
            int numsLength = nums.Count;
            int index;
            while ((index = nums.FindIndex(x => x == bomb[0])) !=-1)
            {
                int leftMargin = index - bomb[1];
                if (leftMargin < 0) leftMargin = 0;
                int rightMargin = index + bomb[1];
                if (rightMargin > numsLength - 1) rightMargin = numsLength - 1;
                for (int i = leftMargin; i <= rightMargin; i++)
                {
                    nums.RemoveAt(leftMargin);
                }
             }
            Console.WriteLine(nums.Sum());
        }
    }
}