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

#ifndef ONLINE_JUDGE
#include "algo/debug.h"
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif

#define int long long

void solve() {
	int n, s;
	cin >> n >> s;
	vector<pair<int, int>> a;
	for (int i = 0, x; i < n; i++) {
		cin >> x;
		a.push_back({x, i + 1});
	}
	sort(a.begin(), a.end());
	vector<int> ans;
	for (int i = 0; i < n; i++) {
		bool ok = 1;
		if (i) {
			if (a[i].first - a[i - 1].first <= s) {
				ok = false;
			}
		}

		if (i < n - 1) {
			if (a[i + 1].first - a[i].first <= s) {
				ok = false;
			}
		}
		if (ok) {
			ans.push_back(a[i].second);
		}
	}
	sort(ans.begin(), ans.end());

	cout << ans.size() << '\n';
	for (auto &x : ans) {
		cout << x << " ";
	}
}

signed main() {
#ifndef ONLINE_JUDGE
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "w", stdout);
#else
#endif
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

	int t = 1;
	//cin >> t;

	while (t--) {
		solve();
	}

	// cerr << "Time elapsed: " << ((long double)clock() / CLOCKS_PER_SEC) << " s.\n";
}