#include <bits/stdc++.h>
using namespace std;
string s;
int n, a, b, k, cnt, ans, ind;
vector<int> fin;
int main() {
  cin >> n >> a >> b >> k;
  cin >> s;
  for (int i = 0; i < n; i++) {
    if (s[i] == '0') {
      ans++;
      if (ans == b) {
        ans = 0;
        cnt++;
        fin.push_back(i + 1);
      }
    } else
      ans = 0;
  }
  cnt -= a;
  cnt++;
  cout << cnt << endl;
  while (cnt) {
    cnt--;
    printf("%d ", fin[ind++]);
  }
  return 0;
}
