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