#include <bits/stdc++.h>
using namespace std;
const int M = 1e9 + 7;
int V, E, i, j, k, u, v, x, y, p, q, r, t, n;
vector<int> *g;
vector<bool> sn;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n, a, b, len, _pos = -1, cnt = 0, store;
  vector<int> res;
  cin >> n >> a >> b >> k;
  string s;
  cin.ignore();
  getline(cin, s);
  s += '1';
  for (int i = 0; i < n + 1; i++) {
    if (s[i] == '1') {
      len = i - _pos - 1;
      q = len / b;
      q = min(a, q);
      store = a == 0 ? store : _pos + b * q;
      p = _pos + b * q + b;
      while (p < i) {
        cnt++;
        res.push_back(p + 1);
        p += b;
      }
      _pos = i;
      a -= q;
    }
  }
  res.push_back(store + 1);
  cnt++;
  cout << cnt << endl;
  for (int i = 0; i < res.size(); i++) cout << res[i] << " ";
  cout << "\n";
}
