#include <bits/stdc++.h>
using namespace std;
vector<vector<int> > bord(312345);
vector<int> ans;
int main() {
  std::ios::sync_with_stdio(false);
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  int i, sumi = 0, counter = 0;
  for (i = 0; i < n; i++) {
    if (s[i] == '1') {
      counter++;
    } else {
      bord[counter].push_back(i + 1);
    }
  }
  for (i = 0; i < counter + 1; i++) {
    sumi += bord[i].size() / b;
  }
  sumi -= a;
  sumi++;
  cout << sumi << endl;
  for (i = 0; i < counter + 1; i++) {
    int val = bord[i].size();
    int j = b - 1;
    while (sumi) {
      if (j < val) {
        ans.push_back(bord[i][j]);
        j += b;
        sumi--;
      } else {
        break;
      }
    }
  }
  for (i = 0; i < ans.size(); i++) {
    cout << ans[i] << " ";
  }
}
