#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001
int main(){

	int n;
	cin>>n;
	long long s;
	cin>>s;
	
	vector<long long> a(n);
	rep(i,n){
		cin>>a[i];
	}
	auto b = a;
	sort(b.begin(),b.end());
	vector<int> ans;
	rep(i,n){
		long long d = distance(lower_bound(b.begin(),b.end(),a[i]-s),upper_bound(b.begin(),b.end(),s+a[i]));
		if(d<=1)ans.push_back(i+1);
	}
	cout<<ans.size()<<endl;
	rep(i,ans.size()){
		if(i!=0)cout<<' ';
		cout<<ans[i];
	}
	cout<<endl;
	
	return 0;
}