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 PYTHON3):

Solution:
def main():
    N, X = list(map(int, input().split()))
    if X in [1, 2 * N - 1]:
        print('No')
        return
    # Xを中心として...,X+2,X-1,X,X+1,X-2,...と並べる
    if N == 2:
        ans = [1, 2, 3]
    else:
        target_list = [X + 2, X - 1, X, X + 1, X - 2]
        target_list = [n for n in target_list if 1 <= n <= 2 * N - 1]
        rest_list = [n for n in range(1, 2 * N) if n not in target_list]
        len_rest = len(rest_list)
        ans = rest_list[:len_rest//2] + target_list + rest_list[len_rest//2:]
    print('Yes')
    for a in ans:
        print(a)


if __name__ == '__main__':
    main()