#include <bits/stdc++.h>

using namespace std;

void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

void solve() {
    long long n, x;
    cin >> n >> x;
    if (x < n * (n + 1) / 2) {
        cout << "-1\n";
        return;
    }
    long long tot = n * (n + 1) / 2;
    long long k = (x - tot) / n, r = (x - tot) % n;
    vector<long long> ans;
    if (k == 0) {
        for (int i = n; i > 0; i--) {
            ans.push_back(k + i);
        }
    } else {
        for (int i = n; i > n - r; i--) {
            ans.push_back(k + i + 1);
        }
        for (int i = n - r; i > 0; i--) {
            ans.push_back(k + i);
        }
    }
    for (int i = 0; i < n; i++) {
        cout << ans[i] << (i == n - 1 ? '\n' : ' ');
    }
}
int main() {
    fast_io();
    int t;
    cin >> t;
    for (; t--;) {
        solve();
    }
}