#include<iostream>
#include<vector>
#include<ranges>
using namespace std;
using ll = long long;

int main() {
    int T; cin >> T;
    while(T--) {
        int N; ll X; cin >> N >> X;
        vector<ll> ans {0};

        auto res = X;
        auto success = true;
        for(int i = 1; i <= (N - 1); ++i) {
            if (res < i) {
                success = false;
                break;
            }
            ans.push_back(i);
            res -= i;
        }

        if (res <= ans.back()) {
            success = false;
        }
        ans.push_back(res);

        if (success) {
            for(int i = 1; i <= N; ++i) {
                cout << ans[i] << " ";
            }
            cout << endl;
        } else {
            cout << -1 << endl;
        }
    }
}