#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string str;
  cin >> str;
  vector<pair<int, int> > ans;
  int i = 0;
  while (i < n) {
    int cnt = 0;
    int j = i;
    while (i < n && str[i] == '0') {
      cnt++;
      i++;
    }
    i++;
    if (cnt >= b) ans.push_back({cnt, j});
  }
  sort(ans.begin(), ans.end());
  vector<int> arr;
  int cnt = 0;
  for (int i = 0; i < ans.size(); i++) cnt += ans[i].first / b;
  cnt -= a;
  cnt += 1;
  for (int i = 0; i < ans.size(); i++) {
    int val = ans[i].first / b;
    int x = 1;
    while (min(cnt, val)) {
      arr.push_back(ans[i].second + x * b);
      cnt -= 1;
      x += 1;
      val -= 1;
    }
    if (cnt == 0) break;
  }
  cout << arr.size() << endl;
  for (int i = 0; i < arr.size(); i++) cout << arr[i] << " ";
  cout << endl;
  return 0;
}
