#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll = long long;
#define rep(i, s, t) for (ll i = s; i < (ll)(t); i++)

template<typename T>
bool chmin(T &x, T y) { return x > y ? (x = y, true) : false; }
template<typename T>
bool chmax(T &x, T y) { return x < y ? (x = y, true) : false; }

struct io_setup {
	io_setup() {
		ios::sync_with_stdio(false);
		std::cin.tie(nullptr);
		cout << fixed << setprecision(15);
	}
} io_setup;

using mint = atcoder::modint1000000007;

int main(){
	int n,s;
	cin>>n>>s;
	vector<int> p(n);
	rep(i,0,n) cin>>p.at(i);
	vector<int> q(n);
	iota(q.begin(),q.end(),0);
	sort(q.begin(),q.end(),[&](int i,int j){return p.at(i)<p.at(j);});
	vector<int> ans;
	rep(i,0,n){
		int flg=0;
		if(i>0&&p.at(q.at(i-1))+s>=p.at(q.at(i))) flg=1;
		if(i<n-1&&p.at(q.at(i))+s>=p.at(q.at(i+1))) flg=1;
		if(!flg) ans.push_back(q.at(i));
	}
	sort(ans.begin(),ans.end());
	cout<<ans.size()<<"\n";
	for(int x:ans) cout<<x+1<<" ";
	cout<<"\n";
}