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

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N,S; cin >> N >> S;
    vector<pair<int,int>> A(N);
    for(int i=0; i<N; i++){
        int p; cin >> p;
        A.at(i) = {p,i};
    }
    sort(A.begin(),A.end());

    vector<int> answer;
    for(int i=0; i<N; i++){
        auto [a,pos] = A.at(i);
        bool ok = true;
        if(i){
            auto [a2,ig] = A.at(i-1);
            if(abs(a-a2) <= S) ok = false;
        } 
        if(i != N-1){
            auto [a2,ig] = A.at(i+1);
            if(abs(a-a2) <= S) ok = false;
        }
        if(ok) answer.push_back(pos);
    }
    sort(answer.begin(),answer.end());
    cout << answer.size() << endl;
    for(auto &a : answer) cout << a+1 << " "; cout << endl;
}