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

namespace P05BombNumbers
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> sequence = Console.ReadLine().Split().Select(int.Parse).ToList();
            List<int> specialNumber = Console.ReadLine().Split().Select(int.Parse).ToList();
            DetonateEveryBombNumberFromLeft(sequence, specialNumber);
            DetonateEveryBombNumberFromRight(sequence, specialNumber);
            int sum = 0;
            Console.WriteLine(SumElementsOfList(sequence, sum));
        }

        private static void DetonateEveryBombNumberFromRight(List<int> sequence, List<int> specialNumber)
        {
            for (int i = 0; i < sequence.Count; i++)
            {
                if (sequence[i] == specialNumber[0])
                {
                    int powerNumber = specialNumber[1];
                    int indexFromRight = (sequence.Count - 1) - i;
                    if (indexFromRight < powerNumber)
                    {
                        sequence.RemoveRange(i, indexFromRight);
                        sequence.RemoveAt(i);
                    }
                    else if (indexFromRight >= powerNumber)
                    {
                        sequence.RemoveRange(i, powerNumber);
                        sequence.RemoveAt(i);
                    }
                    else if (indexFromRight == 0)
                    {
                        sequence.RemoveAt(i);
                    }
                }
            }
        }

        private static int SumElementsOfList(List<int> sequence, int sum)
        {
            for (int i = 0; i < sequence.Count; i++)
            {
                sum += sequence[i];
            }
            return sum;
        }

        private static void DetonateEveryBombNumberFromLeft(List<int> sequence, List<int> specialNumber)
        {
            for (int i = 0; i < sequence.Count; i++)
            {
                int countIndexes = i;
                if (sequence[i] == specialNumber[0])
                {
                    int powerNumber = specialNumber[1];
                    int indexFromLeft = i - powerNumber;
                    if (countIndexes >= powerNumber)
                    {
                        sequence.RemoveRange(indexFromLeft, powerNumber);
                    }
                    else if (indexFromLeft == 0)
                    {
                        sequence.RemoveAt(i);
                    }
                    else
                    {
                        sequence.RemoveRange(i, sequence[0]);
                    }
                }
            }
        }
    }
}