2 1
1 1
 4 1
2 2 1 1
 10 1
2 6 3 4 2 4 4 3 2 1
 2 1
999152 999153
 8 1000000
1 1 5 1000000 1000000 2 2 2
 9 2
1 6 1 5 5 8 6 8 7
 15 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 1 4
8
 10 1
6 3 1 3 6 4 1 3 6 4
 10 1
1 2 3 5 6 8 10 11 9 4
 7 2
1 5 5 8 9 8 8
 2 1000000
1 1000000
 8 2
3 13 9 8 3 13 9 14
 1 1
1
 2 1
1 2

2
 2
 4
 1
 2
 4
 15
 1
 7
 2
 4
 1
 5
 1
 1

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
public class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner in=new Scanner(System.in);
		int n=in.nextInt();
		int a=in.nextInt();
		ArrayList<Integer> al=new ArrayList();
		for (int i=0;i<n;i++)
		al.add(in.nextInt());
		Collections.sort(al);
		for(int i=0;i<al.size();i++){
			while(i<al.size()-1 &&  al.get(i+1)>al.get(i) &&al.get(i+1)<=(int)al.get(i)+a)
			{
				al.remove(i);
			}
		}
		System.out.println(al.size());
	}
}