#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  vector<int> maxsh;
  int curlen = 0;
  for (int i = 0; i < s.size(); ++i) {
    if (s[i] == '0') {
      curlen++;
    } else {
      if (curlen > 0) {
        maxsh.push_back(curlen / b);
      }
      curlen = 0;
    }
  }
  if (curlen > 0) {
    maxsh.push_back(curlen / b);
  }
  int maxi = 0;
  for (int i = 0; i < maxsh.size(); ++i) {
    maxi += maxsh[i];
  }
  int col = maxi - a + 1;
  cout << col << endl;
  curlen = 0;
  for (int i = 0; i < s.size(); ++i) {
    if (col == 0) break;
    if (s[i] == '0') {
      curlen++;
      if (curlen == b && col > 0) {
        printf("%d ", i + 1);
        col--;
        curlen = 0;
      }
    } else {
      curlen = 0;
    }
  }
  return 0;
}
