#include<iostream>
#define ll long long
using namespace std;

int main() {
    int t;
    cin >> t;
    for (int i = 0; i < t; i++) {
        ll n, x;
        cin >> n >> x;
        ll d = x - n * (n + 1) / 2;
        if (d >= 0) {
            ll p = d / n, q = d % n;
            for (int j = 1; j <= n; j++) {
                if (j <= q) cout << n + 1 - j + p + 1;
                else cout << n + 1 - j + p;
                if (j == n) cout << endl;
                else cout << " ";
            }
        }
        else cout << -1 << endl;
    }
}