Problem: We have a pyramid with N steps, built with blocks. The steps are numbered 1 through N from top to bottom. For each 1≤i≤N, step i consists of 2i-1 blocks aligned horizontally. The pyramid is built so that the blocks at the centers of the steps are aligned vertically.

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A pyramid with N=4 steps

Snuke wrote a permutation of (1, 2, ..., 2N-1) into the blocks of step N. Then, he wrote integers into all remaining blocks, under the following rule:

* The integer written into a block b must be equal to the median of the three integers written into the three blocks directly under b, or to the lower left or lower right of b.



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Writing integers into the blocks

Afterwards, he erased all integers written into the blocks. Now, he only remembers that the integer written into the block of step 1 was x.

Construct a permutation of (1, 2, ..., 2N-1) that could have been written into the blocks of step N, or declare that Snuke's memory is incorrect and such a permutation does not exist.

Constraints

* 2≤N≤10^5
* 1≤x≤2N-1

Input

The input is given from Standard Input in the following format:


N x


Output

If no permutation of (1, 2, ..., 2N-1) could have been written into the blocks of step N, print `No`.

Otherwise, print `Yes` in the first line, then print 2N-1 lines in addition.

The i-th of these 2N-1 lines should contain the i-th element of a possible permutation.

Examples

Input

4 4


Output

Yes
1
6
3
7
4
5
2


Input

2 1


Output

No

Solution (in PYTHON):

Solution:
n,x=map(int,raw_input().split())
if n==2 and x==2:
    print("Yes")
    print(1)
    print(2)
    print(3)
    exit()
elif n==2 and x!=2:
    print("No")
    exit()
ans=[0]*(2*n-1)
if x-1>=1 and x+1<=2*n-1:
    print("Yes")
    ans[(2*n-1)/2]=x
    ans[(2*n-1)/2+1]=x+1
    ans[(2*n-1)/2-1]=x-1
    j=1
    i=0
    while i<2*n-1:
        if j==x or j==x-1 or j==x+1:
            j+=1
            continue
        if ans[i]!=0:
            i+=1
            continue
        else:
            ans[i]=j
            j+=1
            i+=1
    for i in xrange(2*n-1):
        print(ans[i])
else:
    print("No")