#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, k;
  cin >> n >> k;
  vector<pair<int, int> > v;
  for (int i = 0; i < n; i++) {
    int a;
    cin >> a;
    v.push_back(make_pair(a, i));
  }
  sort(v.begin(), v.end());
  int cur = 0;
  vector<int> ans;
  for (int i = 0; i < v.size() && cur + v[i].first <= k; i++) {
    cur += v[i].first;
    ans.push_back(v[i].second);
  }
  cout << ans.size() << endl;
  for (int i = 0; i < ans.size(); i++) {
    cout << ans[i] + 1 << " ";
  }
}
