#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  vector<pair<int, int>> c;
  int cur = 0;
  int poss = 0;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == '0')
      cur++;
    else {
      if (cur >= b) {
        c.push_back({cur / b, i + 1});
        poss += cur / b;
      }
      cur = 0;
    }
  }
  if (cur >= b) {
    c.push_back({cur / b, n + 1});
    poss += cur / b;
    cur = 0;
  }
  cout << poss - a + 1 << '\n';
  for (int i = 0; i < c.size(); i++) {
    for (int j = 1; j <= c[i].first; j++) {
      if (poss < a) break;
      cout << c[i].second - j * b << ' ';
      poss--;
    }
    if (poss < a) break;
  }
  cout << '\n';
  return 0;
}
