#include <bits/stdc++.h>
using namespace std;
const int inf = (int)1e9;
const long long linf = (long long)1e18;
const int mod = (int)1e9 + 7;
const long double eps = (long double)1e-8;
const int maxn = (int)1e5 + 5;
const long double pi = acos(-1);
string s;
long long a, b, k, n, last;
vector<long long> c, l, r;
vector<int> ans;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cin >> n >> a >> b >> k;
  cin >> s;
  last = -1;
  c.clear();
  for (auto i = 0; i < ((int)(s).size()) + 1; ++i) {
    if (i == ((int)(s).size()) || s[i] == '1') {
      if (i - last - 1 >= b) {
        c.push_back(i - last - 1);
        l.push_back(last + 1);
        r.push_back(i - 1);
      }
      last = i;
    }
  }
  long long s = 0;
  ans.clear();
  for (auto i = 0; i < ((int)(c).size()); ++i) {
    s += c[i] / b;
    for (auto j = 0; j < (c[i] / b); ++j) {
      ans.push_back(l[i] + (j + 1) * b - 1);
    }
  }
  cout << (s - a) + 1 << endl;
  for (auto i = 0; i < (s - a) + 1; ++i) cout << ans[i] + 1 << " ";
  cout << endl;
  return 0;
}
