#include <bits/stdc++.h>
using namespace std;
void smain();
int main() {
  ios_base::sync_with_stdio(0);
  smain();
  return 0;
}
long long n, a, b, k;
char s[200005];
void smain() {
  for (; cin >> n >> a >> b >> k >> s;) {
    long long cnt = 0;
    vector<long long> res;
    for (long long i = 0; i < n; i++) {
      cnt += 1;
      if (s[i] == '1')
        cnt = 0;
      else if (cnt == b)
        res.push_back(i), cnt = 0;
    }
    res.resize((long long)res.size() - a + 1);
    cout << res.size() << '\n';
    for (auto i : res) cout << i + 1 << ' ';
    cout << endl;
  }
}
