#include <bits/stdc++.h>
//#include <atcoder/all>
using ll = long long;
#define MOD 1000000007
#define Mod 998244353
const int MAX = 1000000005;
const long long INF = 1000000000000000005LL;
using namespace std;
//using namespace atcoder;
#define MOD 1000000007



int main() {
    ios::sync_with_stdio(0); cin.tie();
    int N, S;
    cin >> N >> S;
    vector<pair<int, int>> P(N);
    for (int i = 0; i < N; i++) {
        cin >> P[i].first;
        P[i].second = i + 1;
    }
    sort(P.begin(), P.end());
    vector<int> ans;
    for (int i = 0; i < N; i++) {
        if (i > 0 && abs(P[i].first - P[i-1].first) <= S) continue;
        if (i < N-1 && abs(P[i].first - P[i+1].first) <= S) continue;
        ans.push_back(P[i].second);
    }
    sort(ans.begin(), ans.end());
    cout << ans.size() << endl;
    for (int i = 0; i < (int)ans.size(); i++) {
        cout << ans[i] << (i+1 == (int)ans.size() ? "\n" : " ");
    }
}