#include <bits/stdc++.h>
using namespace std;
int dcmp(double x, double y) {
  return fabs(x - y) <= 1e-10 ? 0 : x < y ? -1 : 1;
}
const int MAX = 2 * 1e5 + 10;
int n, a, b, k;
string in;
int ans[MAX];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  ;
  cin >> n >> a >> b >> k >> in;
  int ptr = 0;
  int ptr1 = 0;
  int cnt = 0;
  for (int i = 0; i < ((int)((in).size())); ++i) {
    if (in[i] == '0')
      ptr++;
    else if (in[i] == '1') {
      ptr = 0;
    }
    if (ptr == b) {
      ptr = 0;
      cnt++;
      ans[ptr1++] = i + 1;
    }
  }
  cnt -= a - 1;
  cout << cnt << '\n';
  for (int i = 0; i < (int)(cnt); ++i) {
    cout << ans[i] << ' ';
  }
}
