#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

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;
    p.emplace_back(-2e9,n);
    p.emplace_back(2e9+2,n+1);
    sort(p.begin(),p.end());
    vector<int> ans;
    for(int i=1;i<=n;i++){
        if(min(abs(p[i].first-p[i+1].first), abs(p[i].first-p[i-1].first))>s) ans.push_back(p[i].second+1);
    }
    sort(ans.begin(),ans.end());
    cout << ans.size() << endl;
    for(int a : ans) {
        cout << a << " ";
    }
    cout << endl;
    return 0;
}