#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  int cnt = 0;
  char last = '1';
  vector<int> pos;
  for (int i = 0; i < s.size(); i++)
    if (s[i] == '0') {
      if (last == '0')
        cnt++;
      else
        cnt = 1, last = '0';
      if (cnt == b) {
        pos.push_back(i);
        cnt = 0;
      }
    } else
      last = '1', cnt = 0;
  int ats = pos.size() - a + 1;
  cout << ats << "\n";
  for (int i = 0; i < ats; i++) cout << pos[i] + 1 << "\n";
}
