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

using lint = long long;

int main() {
    int t;
    cin >> t;
    while (t--) {
        lint n, x;
        cin >> n >> x;
        lint s = (n + 1LL) * n / 2LL;
        if (s > x) {
            cout << -1 << endl;
        } else {
            lint diff = x - s;
            lint q = diff / n, r = diff % n;
            for (lint i = n; i >= 1; i--) {
                cout << (i >= n - r + 1 ? i + q + 1 : i + q) << " ";
            }
            cout << endl;
        }
    }
}