#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  s += '1';
  vector<int> all_pos;
  int was = 0;
  int start = 0;
  for (int i = 0; i <= n; i++) {
    if (s[i] == '1') {
      int end = i;
      for (int i = start; i < end; i += b) {
        if (i + b - 1 < end) all_pos.push_back(i + b);
      }
      start = i + 1;
    }
  }
  int cnt = all_pos.size();
  int need;
  for (need = 0; need <= cnt; need++) {
    if (cnt - need < a) {
      break;
    }
  }
  cout << need << '\n';
  for (int i = 0; i < need; i++) {
    cout << all_pos[i] << ' ';
  }
  cout << '\n';
}
