#include <bits/stdc++.h>
using namespace std;
const int MAX = 1e5 + 9;
int n, a, b, k, p[200010];
string s;
int main() {
  cin >> n >> a >> b >> k >> s;
  int c = 0, q = 0, t = 0, ans = 0;
  for (int i = 0; i < s.size(); 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 = 1; i <= (q - a + 1); i++) cout << p[i] << " ";
  cout << endl;
  return 0;
}
