class Program
{
    static void Main(string[] args)
    {
        int[] nk = Array.ConvertAll(Console.ReadLine().Split(' '), num => int.Parse(num));
        var pinList = Array.ConvertAll(Console.ReadLine().Split(' '), num => int.Parse(num));
        int count = 0;
        for(int i = 0; i < pinList.Length; i++)
        {
            if (pinList[i] == 0)
            {
                continue;
            }
            for (int j = i+1;j < pinList.Length; j++)
            {
                if (pinList[j] - pinList[i] >= nk[1])
                {
                    count++;
                    break;
                }
                pinList[j] = 0;
            }
        }
        if(pinList.Length == 1)
        {
            count = 1;
        }
        Console.WriteLine(count);
    }

    //private static int PinCount(int[] pinList)
    //{
    //    int count = 0;
    //    foreach (int pin in pinList)
    //    {
    //        if(pin != 0)
    //        {
    //            count++;
    //        }
    //    }
    //    return count;
    //}
}