namespace AtCoder;

#nullable enable

using System.Numerics;

static class Extensions
{
    public static T[] Repeat<T>(this int time, Func<T> F) => Enumerable.Range(0, time).Select(_ => F()).ToArray();
}

class AtCoder
{
    object? Solve()
    {
        var t = Int();
        var ans = new int[t][];
        for (var lp = 0; lp < t; lp++)
        {
            var n = Int();
            var m = Int();
            var lns = new int[n];
            lns[--m] = 1;
            var q = new PriorityQueue<(int, int, int), (int, int)>();
            q.Enqueue((0, m, 0), (-m, 0));
            q.Enqueue((m, n - 1, n - 1), (-(n - 1 - m), n - 1));
            for (var i = 1; i < n; i++)
            {
                var (l, r, c) = q.Dequeue();
                lns[c] = i + 1;
                var cl = (l + c) / 2;
                if (cl != l && cl != c) q.Enqueue((l, c, cl), (-Math.Min(c - cl, cl - l), cl));
                var cr = (c + r) / 2;
                if (cr != c && cr != r) q.Enqueue((c, r, cr), (-Math.Min(r - cr, cr - c), cr));
            }
            ans[lp] = lns;
        }
        foreach (var lns in ans) Out(lns, " ");
        return null;
    }

    public static void Main() => new AtCoder().Run();
    public void Run()
    {
        var res = Solve();
        if (res != null)
        {
            if (res is bool yes) res = yes ? "Yes" : "No";
            sw.WriteLine(res);
        }
        sw.Flush();
    }

    string[] input = Array.Empty<string>();
    int iter = 0;
    readonly StreamWriter sw = new(Console.OpenStandardOutput()) { AutoFlush = false };

    string String()
    {
        while (iter >= input.Length) (input, iter) = (Console.ReadLine()!.Split(' '), 0);
        return input[iter++];
    }
    T Input<T>() where T : IParsable<T> => T.Parse(String(), null);
    int Int() => Input<int>();
    void Out(object? x, string? separator = null)
    {
        separator ??= Environment.NewLine;
        if (x is System.Collections.IEnumerable obj and not string)
        {
            var firstLine = true;
            foreach (var item in obj)
            {
                if (!firstLine) sw.Write(separator);
                firstLine = false;
                sw.Write(item);
            }
        }
        else sw.Write(x);
        sw.WriteLine();
    }
}