#include <bits/stdc++.h>
using namespace std;
string str;
int n, a, b, k;
vector<int> arr(200001);
int main() {
  cin >> n >> a >> b >> k;
  cin >> str;
  int cnt = 0, tot = 0, res = 0;
  for (int i = 0; i < n; i++) {
    if (str[i] == '0')
      cnt++;
    else {
      cnt = 0;
    }
    if (tot == a - 1) {
      if (cnt == b) {
        arr[res] = i + 1;
        res++;
        cnt = 0;
      }
    } else {
      if (cnt == b) {
        tot++;
        cnt = 0;
      }
    }
  }
  cout << res << endl;
  for (int i = 0; i < res; i++) cout << arr[i] << " ";
  cout << endl;
}
