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

int main()
{
    int T;
    cin >> T;
    for (int t = 0; t < T; t++)
    {
        int N;
        long long X;
        cin >> N >> X;
        long long sum = 1LL * N * (N + 1) / 2;
        if (sum > X)
            cout << -1 << endl;
        else
        {
            long long last = X - sum + N;
            for (int i = 1; i <= N - 1; i++)
            {
                cout << i << " ";
            }
            cout << last << endl;
        }
    }
}