import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int s = sc.nextInt();
        TreeSet<Star> stars = new TreeSet<>();
        for (int i = 1; i <= n; i++) {
            stars.add(new Star(i, sc.nextInt()));
        }
        stars.add(new Star(0, Integer.MIN_VALUE / 2));
        stars.add(new Star(0, Integer.MAX_VALUE));
        List<Star> ans = stars.stream()
            .filter(x -> x.idx != 0 && x.value - stars.lower(x).value > s && stars.higher(x).value - x.value > s)
            .sorted((a, b) -> a.idx - b.idx)
            .toList();
        System.out.println(ans.size());
        System.out.println(ans.stream().map(x -> x.toString()).collect(Collectors.joining(" ")));
    }
    
    static class Star implements Comparable<Star> {
        int idx;
        int value;
        
        public Star(int idx, int value) {
            this.idx = idx;
            this.value = value;
        }
        
        public int hashCode() {
            return idx;
        }
        
        public boolean equals(Object o) {
            Star s = (Star)o;
            return idx == s.idx && value == s.value;
        }
        
        public int compareTo(Star another) {
            return value == another.value ? idx - another.idx : value - another.value;
        }
        
        public String toString() {
            return String.valueOf(idx);
        }
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}