#include <bits/stdc++.h>
using namespace std;
int n, a, b, k;
char str[200010];
int shoot[200010];
int main() {
  scanf("%d%d%d%d", &n, &a, &b, &k);
  scanf("%s", str);
  int cnt = 0;
  int last = -1;
  int st = 0;
  for (int i = 0; i < n; i++)
    if (str[i] == '1') {
      for (int j = last + b; j < i; j += b) shoot[st++] = j + 1;
      cnt = cnt + (i - last - 1) / b;
      last = i;
    }
  cnt = cnt + (n - last - 1) / b;
  for (int j = last + b; j < n; j += b) shoot[st++] = j + 1;
  printf("%d\n", cnt - a + 1);
  for (int i = 0; i < cnt - a + 1; i++) printf("%d ", shoot[i]);
  return 0;
}
