#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vi = vector<int>;
using vl = vector<ll>;
using pi = pair<int,int>;
using pl = pair<ll,ll>;
#define all(x) x.begin(),x.end()
#define rep(i,j,n) for (long long i = j; i < (long long)(n); i++)
const long long MOD = 1000000007;
const long long MOD2 = 998244353;
const int INF = ((1<<30)-1);
const long long LINF = (1LL<<60);
const double PI = 3.141592653589793238;
template<class T> inline bool chmax(T& a, T b) {
    if (a < b) {a = b;return 1;} return 0;
}
template<class T> inline bool chmin(T& a, T b) {
    if (a > b) {a = b;return 1;} return 0;
}

/*
#include <atcoder/all>
using mint = atcoder::modint998244353;
using namespace atcoder;
*/

//--------------------------------------------------




int solve(){
    ll n,s; cin >> n >> s;
    vector<pl> a(n);
    rep(i,0,n){
        cin >> a[i].first;
        a[i].second = i;
    }
    sort(all(a));
    vl ans;
    rep(i,0,n){
        ll d = LINF;
        if(i != 0)chmin(d, a[i].first-a[i-1].first);
        if(i != n-1)chmin(d , a[i+1].first-a[i].first);
        if(d > s)ans.push_back(a[i].second);
    }
    cout << ans.size() << endl;
    rep(i,0,ans.size())cout << ans[i] << " ";
    cout << endl;

    
    return 0;
}


 
int main(){
    cout << fixed << setprecision(20);
    ios::sync_with_stdio(0), cin.tie(0);
    int t = 1; 
    //cin >> t;
    for(int i = 0; i < t; i++){
        solve();
    }
	return 0;
}