#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  int count = 0;
  int index = n - 1;
  while (count < a) {
    int x = 0;
    while (index >= 0 && x < b) {
      x++;
      if (s[index] == '1') {
        x = 0;
      }
      index--;
    }
    for (int i = 1; i <= x; i++) {
      s[i + index] = '2';
    }
    count++;
  }
  count = 0;
  vector<long long int> ans;
  for (int i = 0; i < n; i++) {
    if (s[i] == '1') {
      count = 0;
      continue;
    }
    count++;
    if (count == b) {
      ans.push_back(i + 1);
      count = 0;
      if (s[i] == '2') {
        break;
      }
    }
  }
  cout << ans.size() << endl;
  for (int i = 0; i < ans.size(); i++) {
    cout << ans[i] << " ";
  }
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int t = 1;
  for (int i = 1; i <= t; i++) {
    solve();
  }
}
