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 CPP):

Solution:
#include <iostream>
#include <cstdio>
using namespace std;

int n, x, ans[400000];
int main()
{
	int i, j;
	cin >> n >> x;
	if (x == 1 || x == 2 * n - 1) {
		cout << "No" << endl;
		return 0;
	}
	cout << "Yes" << endl;
	ans[n] = x;
	ans[n - 1] = x - 1;
	ans[n + 1] = x + 1;
	j = 1;
	for (i = 1; i <= n * 2 - 1; i++) {
		if (j == x - 1) j = x + 2;
		if (ans[i] == 0) {ans[i] = j; j++;}
	}

	for (i = 1; i <= n * 2 - 1; i++) {
		printf("%d\n", ans[i]);
	}
    return 0;
}