using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var t = NN;
        var ans = new string[t];
        for (var u = 0; u < t; ++u)
        {
            var c = NList;
            var (n, x) = (c[0], c[1]);
            ans[u] = Down(n, x);
        }
        WriteLine(string.Join("\n", ans));
    }
    static string Down(long n, long x)
    {
        if (x < n * (n + 1) / 2) return "-1";
        var ng = 0L;
        var ok = x;
        while (ok - ng > 1)
        {
            var mid = (ok + ng) / 2;
            if ((mid * 2 - n + 1) * n / 2 >= x) ok = mid;
            else ng = mid;
        }
        var sum = 0L;
        var ans = new long[n];
        for (var i = 0; i < n; ++i)
        {
            ans[i] = ok - i;
            sum += ok - i;
        }
        for (var i = n - 1; i >= 0; --i) if (sum > x)
        {
            --ans[i];
            --sum;
        }
        return string.Join(" ", ans);
    }
}