#include <bits/stdc++.h>
using namespace std;

int fact(int n){
    if(n == 1 || n == 0)
        return 1;
    else
        return n*fact(n-1);
}

int main(){
    int q;
    cin >> q;
    while(q--){
        int len;
        int c;
        cin >> len >> c;
        // your code goes here
        if(len == 1)
            cout << 1 << endl;           
        else if(len > 1 && c == 0 || c > fact(len - 1))
            cout << -1 << endl;    
        else if(c == fact(len - 1) && len > 3){
            for(auto i = len; i > 0; i--)
                cout << i << " ";
            cout << endl;
        }   
        else{
            for(auto i = 1; i <= len; i++)
                cout << i << " ";
            cout << endl;
        }
    }
    return 0;
}