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

typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
#define RIDLs_code ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define fi1(x) for(int i=1;i<=x;++i)
#define fi0(x) for(int i=0;i<x;++i)
#define fj0(x) for(int j=0;j<x;++j)
#define fj1(x) for(int j=1;j<=x;++j)
#define For(elem, begin, end) for(int elem=begin;elem<end;++elem)
#define RFor(elem, begin, end) for(int elem=begin;elem>=end;--elem)
#define all(x) (x).begin(), (x).end()
#define pb push_back
const int MOD = 1e9+7;
const int INF = 0x3f3f3f3f;
bool is[200005]={false};
bool cmp(pair<ll, ll> a, pair<ll, ll> b)
{
    return a.first<b.first;
}
void solve(){
    int n, s, cnt=0;
    cin>>n>>s;
    vector<pair<ll, ll>> a;
    ll pos, ind;
    fi1(n){
        cin>>pos;
        a.push_back(make_pair(pos, i));

    }
    sort(all(a), cmp);
    fi0(n){
        if(i==0){
            if(a[i+1].first-a[i].first>s){
                is[a[i].second]=true;
                cnt++;
            }
        }
        else if(i==n-1){
            if(a[i].first-a[i-1].first>s){
                is[a[i].second]=true;cnt++;}
        }
        else{
            if(a[i].first-a[i-1].first>s && a[i+1].first-a[i].first>s){
                is[a[i].second]=true;cnt++;}
        }
    }
    cout<<cnt<<endl;
    fi1(n){
        if(is[i]) cout<<i<<" ";
    }
    return;
}
int main(){
	RIDLs_code
    int T=1;
    // cin>>T;
    while (T--) solve();
    return 0;
}