#include <bits/stdc++.h>
using namespace std;
int aa[1000009], vis[1000009];
char s[10001];
int main() {
  int n, a, b, k;
  while (~scanf("%d%d%d%d", &n, &a, &b, &k)) {
    scanf("%s", s);
    int j = 0, k;
    for (int i = 0; i < n; i++) {
      k = 0;
      while (s[i] == '0') {
        k++;
        if (k == b) {
          k = 0;
          aa[j++] = i + 1;
          break;
        }
        i++;
      }
    }
    printf("%d\n", j - a + 1);
    for (int i = 0; i <= j - a; i++) {
      printf("%d ", aa[i]);
    }
    printf("\n");
  }
}
