#include <bits/stdc++.h>
using namespace std;
string s;
int p[200005];
int main() {
  int n, a, b, k;
  string s;
  cin >> n >> a >> b >> k;
  cin >> s;
  int c = 0, q = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == '0')
      c++;
    else
      c = 0;
    if (c == b) p[q++] = i + 1, c = 0;
  }
  cout << q - a + 1 << endl;
  for (int i = 0; i < q - a + 1; i++) {
    cout << p[i] << " ";
  }
  return 0;
}
