N_K, X = [input() for _ in range(2)]
N_K = N_K.split()
N = int(N_K[0])
K = int(N_K[1])
X = X.split()

def main():
	kan(N, K, X)

def kan(n, k, x):
	flag = True
	judge_list = []
	judge_list += x[-1]
	x_rev = sorted(x, reverse=True)
	for i in judge_list:
		for j in x_rev:
			if int(i) - int(j) >= k and j not in judge_list:
				ind = x_rev.index(j)
				tem = x_rev.pop(ind)
				judge_list.append(tem)
				break
	print(len(judge_list))

if __name__ == '__main__':
	main()