#include <bits/stdc++.h>
using namespace std;
int n, a, b, k;
char str[200100];
int main() {
  scanf("%d%d%d%d", &n, &a, &b, &k);
  scanf("%s", str);
  vector<int> spaces;
  int ac = 0;
  int added = 0;
  for (int i = 0; str[i]; i++) {
    if (str[i] == '0') {
      ac++;
      if (ac % b == 0) {
        if (added < a - 1) {
          added++;
        } else {
          spaces.push_back(i + 1);
        }
      }
    } else {
      ac = 0;
    }
  }
  printf("%d\n", (int)spaces.size());
  bool first = true;
  for (vector<int>::iterator it = spaces.begin(); it != spaces.end(); it++) {
    if (!first) {
      printf(" ");
    } else {
      first = false;
    }
    printf("%d", *it);
  }
  printf("\n");
  return 0;
}
