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

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    static int[] LList(long n) => Enumerable.Repeat(0, (int)n).Select(_ => int.Parse(ReadLine())).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (n, p) = (c[0], c[1]);
        var a = NList;
        var list = new List<(int id, int ai)>();
        for (var i = 0; i < n; ++i) list.Add((i, a[i]));
        list.Sort((l, r) => l.ai.CompareTo(r.ai));
        var ans = new List<int>();
        for (var i = 0; i < n; ++i)
        {
            var flg = true;
            if (i > 0 && list[i].ai - list[i - 1].ai <= p) flg = false;
            if (i + 1 < n && list[i + 1].ai - list[i].ai <= p) flg = false;
            if (flg) ans.Add(list[i].id);
        }
        ans.Sort();
        WriteLine(ans.Count);
        WriteLine(string.Join(" ", ans.Select(ai => ai + 1)));
    }
}