#include <bits/stdc++.h>
using namespace std;
string s;
int main() {
  vector<int> v;
  int a, b, n, cnt = 0, shipcnt = 0, k;
  cin >> n >> a >> b >> k >> s;
  for (int i = n - 1; i >= 0; i--) {
    if (s[i] == '1') {
      cnt = 0;
    } else
      cnt++;
    if (cnt == b) {
      cnt = 0;
      s[i] = '2';
      shipcnt++;
      if (shipcnt == a) break;
    }
  }
  cnt = 0;
  int ans = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == '0')
      cnt++;
    else
      cnt = 0;
    if (cnt == b) {
      v.push_back(i + 1);
      ans++;
      cnt = 0;
    }
  }
  for (int i = 0; i < n; i++)
    if (s[i] == '2') {
      v.push_back(i + 1);
      break;
    }
  cout << ans + 1 << endl;
  for (int x : v) cout << x << " ";
}
