#include <bits/stdc++.h>
#include <atcoder/all>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <math.h>
#include <random>
#include <chrono>
#include <cstdint>


using namespace std;
using namespace atcoder;
// using mint = modint998244353;
using mint = modint1000000007;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using vl = vector<long long>;
using vvl = vector<vector<long long>>;
using ll = long long;
template <class T> using max_heap = priority_queue<T>;
template <class T> using min_heap = priority_queue<T, vector<T>, greater<>>;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, f, n) for (int i = (int) f; i < (int)(n); i++)
#define repd(i, n, l) for (int i = (int) n; i >= (int) l; i--)
#define all(p) p.begin(),p.end()
vector<pair<int, int>> dydx{{-1, 0}, {1, 0}, {0, -1 }, {0, 1}};
const ll inf = 1LL << 60;
void print(){ putchar(' '); }
void print(bool a){ printf("%d", a); }
void print(int a){ printf("%d", a); }
void print(unsigned a){ printf("%u", a); }
void print(long a){ printf("%ld", a); }
void print(long long a){ printf("%lld", a); }
void print(unsigned long long a){ printf("%llu", a); }
void print(char a){ printf("%c", a); }
void print(char a[]){ printf("%s", a); }
void print(const char a[]){ printf("%s", a); }
void print(float a){ printf("%.15f", a); }
void print(double a){ printf("%.15f", a); }
void print(long double a){ printf("%.15Lf", a); }
void print(const string& a){ for(auto&& i : a) print(i); }
template<class T> void print(const complex<T>& a){ if(a.real() >= 0) print('+'); print(a.real()); if(a.imag() >= 0) print('+'); print(a.imag()); print('i'); }
template<class T> void print(const vector<T>&);
template<class T, size_t size> void print(const array<T, size>&);
template<class T, class L> void print(const pair<T, L>& p);
template<class T, size_t size> void print(const T (&)[size]);
template<class T> void print(const vector<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i); } }
template<class T> void print(const deque<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i); } }
template<class T, size_t size> void print(const array<T, size>& a){ print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i); } }
template<class T, class L> void print(const pair<T, L>& p){ print(p.first); putchar(' '); print(p.second); }
template<class T, size_t size> void print(const T (&a)[size]){ print(a[0]); for(auto i = a; ++i != end(a); ){ putchar(' '); print(*i); } }
template<class T> void print(const T& a){ cout << a; }


int main() {
    int n, s; cin >> n >> s;
    vector<pair<int, int>> p(n);
    rep(i, n) cin >> p[i].first;
    rep(i, n) p[i].second = i + 1;
    sort(all(p));
    vi ans;
    rep(i, n){
        bool f = true;
        if (i > 0) {
            if (p[i].first - p[i-1].first <= s) f = false;
        }
        if (i < n-1){
            if (p[i+1].first - p[i].first <= s) f = false;
        }
        if (f) ans.push_back(p[i].second);
    }
    cout << ans.size() << endl;
    print(ans);cout << endl;
    return 0;
}