#include <bits/stdc++.h>
const double EPS = 0.00000001;
const long long mod = 1000000000 + 7;
using namespace std;
string s;
vector<int> ans;
int main() {
  ios::sync_with_stdio(0);
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  cin >> s;
  int cur = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == '0')
      cur++;
    else
      cur = 0;
    if (cur == b) {
      ans.push_back(i);
      cur = 0;
    }
  }
  int len = ans.size() - a + 1;
  cout << len << endl;
  for (int i = 0; i < len; i++) cout << ans[i] + 1 << " ";
  int ______________;
  cin >> ______________;
  return 0;
}
