package main

import . "fmt"
import . "sort"
import "math/rand"
func main() {
	var n, s int
	Scan(&n,&s)
	p:=make([]int,n)
	for i:=range p {
		Scan(&p[i])
	}
	idx:=rand.Perm(n)
	Slice(idx,func(i,j int)bool {
		a:=idx[i]
		b:=idx[j]
	return p[a]<p[b]
	})
	f:=make([]int,0,n)
	for j,i:=range idx {
		if j>0&&p[i]-p[idx[j-1]]<=s {
			continue
		}
		if j+1<n&&p[idx[j+1]]-p[i]<=s {
			continue
		}
		f=append(f,i)
	}
	Println(len(f))
	for i,v:=range f {
		if i>0 {
			Print(" ")
		}
		Print(v+1)
	}
	Println()

	
}