#include <bits/stdc++.h>
using namespace std;
int i, n, a, b, w, t, l, k;
string s;
int main() {
  cin >> n >> a >> b >> k >> s;
  for (int i = 0; i < n; i++) {
    if (s[i] == '0')
      l++;
    else {
      w += (l / b);
      l = 0;
    }
  }
  w += (l / b);
  l = 0;
  w -= a - 1;
  cout << w << endl;
  for (int i = 0; i < n && w > 0; i++) {
    if (s[i] == '0')
      l++;
    else
      l = 0;
    if (l == b) cout << i + 1 << ' ', l = 0, w--;
  }
}
