Problem: You are given two integers n and k. You are asked to choose maximum number of distinct integers from 1 to n so that there is no subset of chosen numbers with sum equal to k.

A subset of a set is a set that can be obtained from initial one by removing some (possibly all or none) elements of it.

Input

The first line contains the number of test cases T (1 ≤ T ≤ 100).

Each of the next T lines contains two integers n and k (1 ≤ k ≤ n ≤ 1000) — the description of test cases.

Output

For each test case output two lines. In the first line output a single integer m — the number of chosen integers.

In the second line output m distinct integers from 1 to n — the chosen numbers.

If there are multiple answers, print any. You can print the numbers in any order.

Example

Input


3
3 2
5 3
1 1


Output


2
3 1 
3
4 5 2 
0

Solution (in PYTHON3):

Solution:
t = int(input())
for i in range(t):
    n, k = list(map(int, input().split()))
    ans = []
    for j in range(k+1, n+1):
        ans.append(j)

    for j in range(k, 0, -1):
        if j + j - 1 > k:
            ans.append(j-1)
    # s = 1
    # counter = 2
    # while s < k:
    #     ans.append(counter-1)
    #     counter += 1
    #     s += counter

    print(len(ans))
    print(' '.join(list(map(str, ans))))

    print()