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

a = []
num = raw_input().split()
k = int(num[1])
# num = num[0]
for i in raw_input().split():
    a.append(int(i))

a = sorted(a)
count = 0
same = 0
for i in range(len(a)-1):
    if a[i+1] == a[i]:
        same += 1
    elif a[i+1] > a[i] and a[i+1] <= a[i]+k:
        count += same+1
        same = 0
    else:
        same = 0

print len(a) - count