#include <bits/stdc++.h>
const int MAX = 1e7 + 10;
using namespace std;
int main() {
  int n, a, b, k;
  string s;
  cin >> n >> a >> b >> k >> s;
  int l = 0;
  int ans[200010];
  int r = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == '0') {
      r++;
    } else {
      r = 0;
    }
    if (r == b) {
      r = 0;
      l++;
      ans[l] = i + 1;
    }
  }
  if (l >= a) {
    l -= a - 1;
    cout << l << endl;
    for (int i = 1; i <= l; i++) {
      cout << ans[i] << ' ';
    }
    cout << endl;
  }
  return 0;
}
