#include<bits/stdc++.h>
using namespace std;
using i64 = long long;
using u64 = unsigned long long;
using u32 = unsigned;
#define int long long
using PII = pair<int, int>;
void solve(){
    int n,s;
    cin>>n>>s;
    vector<PII> p(n);
    for (int i = 0; i < n;i++){
        int k;
        cin >> k;
        p[i] = {k, i + 1};
    }
    sort(p.begin(), p.end());
    vector<int> vis(n + 1);
    for (int i = 0; i < n - 1;i++){
        auto [p1, num1] = p[i];
        auto [p2, num2] = p[i + 1];
        if(abs(p1-p2)<=s){
            vis[num1] = vis[num2] = 1;
        }
    }
    vector<int> ans;
    for (int i = 1; i <= n;i++){
        if(!vis[i]){
            ans.push_back(i);
        }
    }
    cout << ans.size() << endl;
    for(auto i:ans)
        cout << i << ' ';
    cout << endl;
}


signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    solve();
    return 0;
}