#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;
  vector<pair<int, int>> se;
  int j = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == '1') continue;
    if (i < j) continue;
    j = i;
    while (j < n && s[j] == '0') j++;
    se.push_back(make_pair(i, j - 1));
    if (j == n) {
      break;
    }
  }
  vector<int> put;
  auto check = [&]() {
    int t = 0;
    for (pair<int, int> x : se) {
      t += (x.second - x.first + 1) / b;
    }
    return t;
  };
  int h = check();
  for (int i = 0; i < se.size(); i++) {
    if (h < a) break;
    for (int t = se[i].first + b - 1; t <= se[i].second && h >= a; t += b) {
      put.push_back(t + 1);
      h--;
    }
  }
  cout << put.size() << "\n";
  for (int x : put) cout << x << " ";
  return 0;
}
