#include <bits/stdc++.h>
using namespace std;
struct Car {
  long long c;
  long long v;
};
bool operator<(const Car &a, const Car &b) { return a.v < b.v; }
const long long INF = 1e10;
int main() {
  ios_base::sync_with_stdio(0);
  int n, a, b, k;
  cin >> n >> b >> a >> k;
  string s;
  cin >> s;
  vector<int> l;
  int prev = -1;
  for (int i = 0; i <= n; ++i) {
    if (i == n || s[i] == '1') {
      l.push_back(i - prev - 1);
      prev = i;
    }
  }
  int mx = 0;
  for (int i = 0; i < (int)(l).size(); ++i) mx += l[i] / a;
  int ans = mx - b + 1;
  cout << ans << endl;
  int cur = 0;
  for (int i = 0; i < n; ++i) {
    if (s[i] == '1') {
      cur = 0;
    } else {
      ++cur;
      if (cur == a && ans) {
        cout << i + 1 << " ";
        --ans;
        cur = 0;
      }
    }
  }
  cout << endl;
  return 0;
}
