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

class Bacteria(object):
    def __init__(self, size):
        self.size = int(size)
        self.consumed = False

    def __le__(self, other):
        return self.size <= other.size

    def __eq__(self, other):
        return self.size == other.size


if __name__ == "__main__":
    n, k = map(int, raw_input().split())
    sizes = sorted(map(int, raw_input().split()))
    bacteria = [Bacteria(i) for i in sizes]

    if len(bacteria) < 2:
        print(len(bacteria))
    else:
        for idx, cur in enumerate(bacteria):
            if idx == 0:
                continue
            victim_idx = idx - 1
            while victim_idx >= 0 and not bacteria[victim_idx].consumed and (bacteria[victim_idx].size < cur.size <= bacteria[victim_idx].size + k):
                bacteria[victim_idx].consumed = True
                victim_idx -= 1

        print(len([b for b in bacteria if not b.consumed]))
            
