// #include <bits/allocator.h> // Temp fix for gcc13 global pragma
// #pragma GCC target("avx2,bmi2,popcnt,lzcnt")
// #pragma GCC optimize("O3,unroll-loops")
#include <bits/stdc++.h>
// #include <x86intrin.h>
using namespace std;
#if __cplusplus >= 202002L
using namespace numbers;
#endif
#ifdef LOCAL
	#include "Debug.h"
#else
	#define debug_endl() 42
	#define debug(...) 42
	#define debug2(...) 42
	#define debugbin(...) 42
#endif



int main(){
	cin.tie(0)->sync_with_stdio(0);
	cin.exceptions(ios::badbit | ios::failbit);
	int n, s;
	cin >> n >> s;
	vector<int> a(n);
	copy_n(istream_iterator<int>(cin), n, a.begin());
	vector<int> order(n);
	iota(order.begin(), order.end(), 0);
	ranges::sort(order, [&](int i, int j){ return a[i] < a[j]; });
	vector<int> res;
	for(auto t = 0; t < n; ++ t){
		if(t > 0 && a[order[t]] - a[order[t - 1]] <= s){
			continue;
		}
		if(t + 1 < n && a[order[t + 1]] - a[order[t]] <= s){
			continue;
		}
		res.push_back(order[t] + 1);
	}
	ranges::sort(res);
	cout << (int)res.size() << "\n";
	ranges::copy(res, ostream_iterator<int>(cout, " "));
	cout << "\n";
	return 0;
}

/*

*/