#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, a, b, k;
  cin >> n >> a >> b >> k;
  bool ship = false;
  long long len = 0;
  bool fired = false;
  long long count = 0;
  stack<long long> st;
  for (long long i = 0; i < n; i++) {
    char ch;
    cin >> ch;
    if (ch == '0') {
      len++;
    } else {
      len = 0;
    }
    if (len == b) {
      if (count < a) {
        count++;
        if (!fired) {
          st.push(i + 1);
          fired = true;
        }
      } else {
        st.push(i + 1);
      }
      len = 0;
    }
  }
  cout << st.size() << "\n";
  while (!st.empty()) {
    cout << st.top() << " ";
    st.pop();
  }
  return 0;
}
