#include <bits/stdc++.h>
using namespace std;
int n, a, b, k, cnt = 0, ans;
string s;
vector<int> arr;
int main(void) {
  ios ::sync_with_stdio(0);
  cin.tie(0);
  cin >> n >> a >> b >> k >> s;
  for (int i = 1; i <= n; ++i) {
    if (s[i - 1] == '0') {
      ++cnt;
    } else {
      cnt = 0;
    }
    if (cnt == b) {
      arr.emplace_back(i);
      cnt = 0;
    }
  }
  ans = int(arr.size()) - (a - 1);
  cout << ans << "\n";
  for (int i = 0; i <= ans - 1; ++i) {
    cout << arr[i] << " ";
  }
  cout << "\n";
  return 0;
}
