#include<bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
    int N,S;
    cin >> N >> S;
    vector<int> P(N);
    for(int i=0;i<N;i++){
        cin >> P[i];
    }
    sort(P.begin(),P.end());
    vector<int> vec;
    if(N==1){
        cout << 1 << endl << 1 << endl;
        return 0;
    }
    if(P[1]-P[0]>S){
        vec.push_back(1);
    }
    if(P[N-1]-P[N-2]>S){
        vec.push_back(N);
    }
    for(int i=1;i<N-1;i++){
        if(P[i]-P[i-1]>S && P[i+1]-P[i]>S){
            vec.push_back(i+1);
        }
    }
    cout << vec.size() << endl;
    sort(vec.begin(),vec.end());
    for(int i : vec){
        cout << i << " ";
    }
    cout << endl;
}