#include <bits/stdc++.h>
using namespace std;
vector<int> v;
char str[1000005];
int main() {
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  cin >> str;
  int i;
  int cnt = 0;
  for (i = 0; str[i] != '\0'; i++) {
    if (str[i] == '1') {
      cnt = 0;
    } else {
      cnt++;
      if (cnt == b) {
        v.push_back(i + 1);
        cnt = 0;
      }
    }
  }
  cout << v.size() - a + 1 << endl;
  for (i = 0; i < v.size() - a + 1; i++) cout << v[i] << " ";
}
