import sys
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))