#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, a, b, q;
  cin >> n >> a >> b >> q;
  string s;
  cin >> s;
  int k = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == '0') {
      k++;
      if (k == b && a) {
        for (int j = 0; j < b; j++) s[i - j] = '2';
        k = 0;
        a--;
      }
    } else {
      k = 0;
    }
  }
  vector<int> ans;
  k = 0;
  int m = 0;
  for (int i = n - 1; i >= 0; i--) {
    if (s[i] == '0' || s[i] == '2') {
      k++;
      if (k == b) {
        k = 0;
        ans.push_back(i);
        if (s[i] == '2') break;
      }
    } else if (s[i] == '1') {
      k = 0;
    } else
      break;
  }
  cout << ans.size() << "\n";
  for (auto i : ans) cout << i + 1 << " ";
  return 0;
}
