#include <bits/stdc++.h>
using namespace std;
const int N = 200005;
int n, a, b, k, pr[N], seq[N];
char s[200005];
int main() {
  scanf("%d%d%d%d", &n, &a, &b, &k);
  scanf("%s", s + 1);
  int len = strlen(s + 1), lst = 0, cur = 0;
  for (int i = 1; i <= len; ++i) {
    if (s[i] == '1') {
      cur += (i - lst - 1) / b;
      lst = i;
    }
  }
  if (s[len] != '1') cur += (len - lst) / b;
  int ans = 0, now = 0, da = 0;
  for (int i = 1; i <= len; ++i) {
    now++;
    if (s[i] == '1') now = 0;
    if (now == b) {
      now = 0;
      ans++;
      seq[ans] = i;
      if (cur - ans < a) break;
    }
  }
  printf("%d\n", ans);
  for (int i = 1; i <= ans; ++i) printf("%d ", seq[i]);
  return 0;
}
