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

if __name__ == '__main__':
	main()