#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef long double ld;
const ll N = 1e9 + 7, N1 = 1e6 + 2;
signed main() {
  ll n, a, b, k, cnt = 0, g = 0;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  ll a1[N1], b1[N1], c[N1];
  memset(a1, -1, sizeof(a));
  ll ind = -1;
  vector<long long> v;
  for (long long i = 0; i < n; i++) {
    if (s[i] == '1') {
      ind = i;
    }
    if (i - ind == b) {
      if (a > 1)
        a--;
      else {
        cnt++;
        v.push_back(i + 1);
      }
      ind = i;
    }
  }
  cout << cnt << "\n";
  for (long long i = 0; i < cnt; i++) cout << v[i] << " ";
  return 0;
}
