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:

for _ in range(int(input())):
    n, k = map(int, input().split())

    aftr_k = list(range(k+1, n+1))
    half_half = k // 2
    if k % 2 != 0:
        half_half += 1
    bfr_k = list(range(half_half, k))
    
    print(len(aftr_k) + len(bfr_k))
    print(' '.join([str(i) for i in aftr_k+bfr_k]))