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:
import math
def getint():
    return [int(i) for i in input().split()]
def getstr():
    return [str(i) for i in input().split()]
#--------------------------------------------------------------------------
def solve():
    n,k=getint()
    ans=n-k+k//2
    print(ans)
    if ans==0:
        return
    for i in range(n,(k+(k%2))//2-1,-1):
        if i==k:
            continue
        print(i,end=" ")
    print()
    
#--------------------------------------------------------------------------
for _ in range(int(input())):
    solve()