#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  int st = -1, t = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == '1') {
      t += (i - 1 - st) / b;
      st = i;
    }
  }
  if (s[n - 1] == '0') t += (n - 1 - st) / b;
  if (t < a) {
    cout << "0\n";
    return 0;
  }
  int del = t - (a - 1);
  cout << del << "\n";
  st = 0;
  for (int i = 0; i < n && del > 0; i++) {
    if (s[i] == '1') {
      st = i + 1;
      continue;
    }
    if (i - st + 1 == b) {
      del--;
      st = i + 1;
      cout << i + 1 << " ";
    }
  }
  cout << "\n";
  return 0;
}
