#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */  
    int q;
    cin >> q;
    while(q--){
        int r, c;
        cin >> r >> c;
        int temp = 0;
        int flag = false;
        int arr[r];
        for(int i = r-1; i >= 0; i--){
            temp+= i;
            if(temp > c){
                temp = 0;
            }
            else if(temp < c){
                temp += i;
            }
            
            
            arr[i] = i+1;
            if(temp == c){
                flag = true;
            }
        }
        int rot  =0;
        if(flag){
            for(int i = 1; i < r; i++){
                if(rot >= c)
                    break;
                
                swap(arr[i], arr[i-1]);
                rot+=2;
            }
            
            for(int i = 0; i < r; i++){
                cout << arr[i] << " ";
                
            }
        }
        else
            cout << "-1";
        
        cout << endl;
        
    }
    return 0;
}