#include<bits/stdc++.h>
using namespace std;
int main(){
	int n, s;
	cin >> n >> s;
	assert(1 <= n && n <= 200000);
	assert(0 <= s && s <= 1000000000);
	vector<int> p(n);
	for(int i = 0; i < n; i++){
		cin >> p[i];
		assert(0 <= p[i] && p[i] <= 1000000000);
	}
	vector<int> ind(n);
	for(int i = 0; i < n; i++) ind[i] = i;
	sort(ind.begin(), ind.end(), [&](int i, int j){
		return p[i] < p[j];
	});
	vector<int> ans(n, 1);
	for(int i = 0; i < n; i++){
		if(i != 0 && p[ind[i]] - p[ind[i-1]] <= s){
			ans[ind[i]] = 0;
			ans[ind[i-1]] = 0;
		}
	}
	vector<int> fans;
	for(int i = 0; i < n; i++) if(ans[i] == 1) fans.push_back(i+1);
	cout << (int)fans.size() << '\n';
	for(int i = 0; i < (int)fans.size(); i++){
		if(i == (int)fans.size()-1) cout << fans[i] << '\n';
		else cout << fans[i] << " ";
	}
}