#include <bits/stdc++.h>
using namespace std;
vector<long long> ans;
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  long long n, a, b, k;
  cin >> n >> a >> b >> k;
  char c;
  long long t = 0;
  for (long long i = 0; i < n; i++) {
    cin >> c;
    if (c == '1')
      t = 0;
    else {
      t++;
      if (t == b) {
        ans.push_back(i);
        t = 0;
      }
    }
  }
  cout << (long long)ans.size() - a + 1 << endl;
  for (long long i = 0; i < (long long)ans.size() - a + 1; i++)
    cout << ans[i] + 1 << " ";
  cout << endl;
  return 0;
}
