import sys
input = sys.stdin.readline

N,X=list(map(int,input().split()))

A=[]
USE=[0]*(10**5+5)

now=4
while N>4:
    if now<=X<now+4:
        now+=4
    else:
        A.append(now)
        A.append(now+1)
        A.append(now+2)
        A.append(now+3)
        now+=4
        N-=4
        
    
for a in A:
    USE[a]=1

S=[]
if sum(USE)>=10**5-10:
    for i in range(1,10**5+5):
        if USE[i]==0:
            S.append(i)

else:
    LIST=[1,2,3,10**5,10**5+1,10**5+2,10**5+3,10**5+4]
    k=X//4*4
    for i in range(k,k+4):
        if i==0:
            continue
        LIST.append(i)

    LIST=sorted(set(LIST))

    for x in LIST:
        if USE[x]==0:
            S.append(x)

for i in range(1<<len(S)):
    if i.bit_count()==N:
        score=0
        L=[]
        for j in range(len(S)):
            if i & (1<<j) != 0:
                score^=S[j]
                L.append(S[j])

        if score==X:
            A+=L
            break

print("\n".join(map(str,A)))