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 n = Int();
        var s = Int();
        var pz = new (int, int)[n];
        for (var i = 0; i < n; i++) pz[i] = (Int(), i + 1);
        Array.Sort(pz);
        var ans = new List<int>();
        var j = 0;
        while (j < n)
        {
            var (v, i) = pz[j];
            if (j + 1 < n)
            {
                var nv = pz[j + 1].Item1;
                if (nv - v > s) ans.Add(i);
            }
            else ans.Add(i);
            while (j + 1 < n && pz[j + 1].Item1 - v <= s)
            {
                j++;
                v = pz[j].Item1;
            }
            j++;
        }
        ans.Sort();
        Out(ans.Count);
        Out(ans, " ");
        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();
    }
}