import sys
def main():
	n,b=map(int,input().split())
	a=list(map(int,input().split()))
	d=len(bin(b))-3
	ltd=[]
	eqd=[]
	for i in a:
		tmp=len(bin(i))-3
		if tmp<d:
			ltd.append(i)
		elif tmp==d:
			eqd.append(i)
	G=[[False]*d for i in range(d)]
	for i in range(d):
		for j in range(d):
			G[i][j]=i==j
	for i in ltd:
		b^=i
		tmp=len(bin(i))-3
		for j in range(tmp):
			if (i>>j&1)==0:
				G[j][tmp]=True
	for k in range(d):
		for i in range(d):
			for j in range(d):
				if G[i][k] and G[k][j]:
					G[i][j]=True
	for i in eqd:
		if b^i==0:
			print(len(ltd)+1)
			sys.exit()
		s=len(bin(b^i))-3
		for j in range(s,d):
			if (i>>j&1)==0 and G[s][j]:
				print(len(ltd)+1)
				sys.exit()
	print(len(ltd))
main()