using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static string InputPattern = "InputX";

    static List<string> GetInputList()
    {
        var WillReturn = new List<string>();

        if (InputPattern == "Input1") {
            WillReturn.Add("3");
            WillReturn.Add("4 10");
            WillReturn.Add("3 5");
            WillReturn.Add("3 9");
        }
        else {
            string wkStr;
            while ((wkStr = Console.ReadLine()) != null) WillReturn.Add(wkStr);
        }
        return WillReturn;
    }

    static void Main()
    {
        List<string> InputList = GetInputList();

        long[] wkArr = { };
        Action<string> SplitAct = pStr =>
            wkArr = pStr.Split(' ').Select(pX => long.Parse(pX)).ToArray();

        foreach (string EachStr in InputList.Skip(1)) {
            SplitAct(EachStr);
            long N = wkArr[0];
            long X = wkArr[1];

            string Result = Solve(N, X);
            Console.WriteLine(Result);
        }
    }

    static string Solve(long pN, long pX)
    {
        var AnswerList = new List<long>();
        for (long I = 1; I <= pN; I++) {
            AnswerList.Add(I);
        }

        long SumVal = AnswerList.Sum();
        if (SumVal > pX) {
            return "-1";
        }
        long Rest = pX - SumVal;
        AnswerList[AnswerList.Count - 1] += Rest;

        return LongEnumJoin(" ", AnswerList);
    }

    // セパレータとLong型の列挙を引数として、結合したstringを返す
    static string LongEnumJoin(string pSeparater, IEnumerable<long> pEnum)
    {
        string[] StrArr = Array.ConvertAll(pEnum.ToArray(), pX => pX.ToString());
        return string.Join(pSeparater, StrArr);
    }

}