#include <bits/stdc++.h>
using namespace std;
string s;
int main() {
  int n, a, b, k;
  scanf("%d%d%d%d", &n, &a, &b, &k);
  int tot = 0;
  cin >> s;
  int prev = -1;
  for (int i = 0; i < n; i++)
    if (s[i] == '1') {
      tot += (i - prev - 1) / b;
      prev = i;
    }
  tot += (n - prev - 1) / b;
  int ans = tot - a + 1;
  printf("%d\n", ans);
  int cnt = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == '1') {
      cnt = 0;
    } else {
      cnt++;
    }
    if (cnt == b && ans) {
      ans--;
      printf("%d ", i + 1);
      cnt = 0;
    }
  }
  printf("\n");
  return 0;
}
