#include <bits/stdc++.h>
using namespace std;
template <typename Arg1>
void __f(const char* name, Arg1&& arg1) {
  cerr << name << " : " << arg1 << '\n';
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args) {
  const char* comma = strchr(names + 1, ',');
  cerr.write(names, comma - names) << " : " << arg1 << " | ";
  __f(comma + 1, args...);
}
template <class T>
void mxi(T& a, const T& b) {
  a = max(a, b);
}
template <class T>
void mni(T& a, const T& b) {
  a = min(a, b);
}
long double EPS = 1e-9;
mt19937 RNG(chrono::steady_clock::now().time_since_epoch().count());
void solve() {
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  int len = 0, sid = 0, cnt = 0;
  vector<pair<int, int> > v;
  for (int i = 0; i < (long long)(s).size(); i++) {
    if (s[i] == '1') {
      if (len >= b) {
        cnt += (int)len / b;
        v.emplace_back(len, sid);
      }
      len = 0;
      sid = 0;
    } else {
      if (sid)
        len++;
      else
        len = 1, sid = i + 1;
    }
  }
  if (len >= b) {
    cnt += (int)len / b;
    v.emplace_back(len, sid);
  }
  int cur = cnt - (a - 1);
  cout << cur << '\n';
  for (auto x : v) {
    for (int i = b; i <= x.first && cur; i += b) {
      cout << x.second - 1 + i << ' ';
      cur--;
    }
    if (cur == 0) break;
  }
  cout << '\n';
}
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int t, tab;
  t = 1;
  tab = t;
  while (t--) {
    solve();
  }
  cerr << ((double)clock() / CLOCKS_PER_SEC);
}
