#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, a, b, k, cur = 0;
  string s;
  cin >> n >> a >> b >> k;
  vector<int> res;
  int count = 0;
  cin >> s;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == '1')
      cur = 0;
    else {
      cur++;
      if (cur == b) {
        res.push_back(i + 1);
        cur = 0;
      }
    }
  }
  cout << res.size() - a + 1 << endl;
  for (int i = 0; i < res.size() - a + 1; i++) cout << res[i] << " ";
  puts("");
}
