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

#ifdef LOCAL
#include <debug_print.hpp>
#define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) (static_cast<void>(0))
#endif

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(20);
    int N, S;
    cin >> N >> S;
    vector<int> P(N);
    for (int i = 0; i < N; i++) cin >> P[i];
    vector<int> id(N);
    iota(id.begin(), id.end(), 0);
    sort(id.begin(), id.end(), [&](int i, int j) { return P[i] < P[j]; });

    vector<int> ans;
    for (int i = 0; i < N; i++) {
        bool flag = true;
        if (0 <= i - 1) {
            if (P[id[i]] - P[id[i - 1]] <= S) flag = false;
        }
        if (i + 1 < N) {
            if (P[id[i + 1]] - P[id[i]] <= S) flag = false;
        }
        if (flag) ans.emplace_back(id[i]);
    }

    sort(ans.begin(), ans.end());
    int M = ans.size();
    cout << M << '\n';
    for (int i = 0; i < M; i++) {
        cout << ans[i] + 1 << " \n"[i == M - 1];
    }
}