#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pi;
#define ALL(x) x.begin(),x.end()
#define rep(i,a,b) for(int i=a;i<b;i++)
using vi = vector<int>; 
using vvi = vector<vi>; 
using li =vector<ll>;
using lli=vector<li>;
using si =vector<char>;
using ssi =vector<si>;
const long long mod=998244353;
//for (auto [key, val] : mp)
int main() { int n;ll s;cin>>n>>s;
vector<pi>P(n);
rep(i,0,n){
	ll a;cin>>a;P[i]={a,i};
}
sort(ALL(P));
vi ans;
if(n==1){
	cout<<1<<endl;
	cout<<1<<endl;
	return 0;
}
if(n==2){
	if(abs(P[1].first-P[0].first)>s){cout<<2<<endl<<1<<" "<<2;return 0;}
}
if(P[1].first-P[0].first>s)ans.push_back(P[0].second);
if(P[n-1].first-P[n-2].first>s)ans.push_back(P[n-1].second);
rep(i,1,n-1){
	if(P[i].first-P[i-1].first>s&&P[i+1].first-P[i].first>s)ans.push_back(P[i].second);
}
sort(ALL(ans));
cout<<(int)ans.size()<<endl;
rep(i,0,(int)(ans.size()))cout<<ans[i]+1<<" ";
}