#include <bits/stdc++.h>
using namespace std;
const long double eps = 1e-9;
const int inf = numeric_limits<int>::max() / 2 - 1;
inline int run() {
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  int cur = 0;
  vector<int> ans;
  for (int i = 0; i < n; ++i) {
    if (s[i] == '0') cur++;
    if (s[i] == '1') cur = 0;
    if (cur == b) ans.push_back(i), cur = 0;
  }
  for (int i = 0; i < a - 1 && ans.size() > 1; ++i) {
    ans.pop_back();
  }
  cout << ans.size() << endl;
  for (auto i : ans) cout << i + 1 << " ";
  return 0;
}
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  run();
  return 0;
}
