namespace _05
{
    internal class Program
    {
        static void Main(string[] args)
        {
            List<int> list = Console.ReadLine().Split().Select(int.Parse).ToList();
            List<int> bomb = Console.ReadLine().Split().Select(int.Parse).ToList();

            for (int i = 0; i < list.Count; i++)
            {
                if (list[i] == bomb[0])
                {
                int bombSpreadStart = Math.Max((i - bomb[1]), 0);
                int bombSpreadEnd = Math.Min((i + bomb[1]), (list.Count-1));

                    for (int j = bombSpreadEnd; j >= bombSpreadStart; j--)
                    {
                        list.RemoveAt(bombSpreadStart);
                    }
                i = 0;
                }
            }
            Console.WriteLine(list.Sum());
        }
    }
}