#include <bits/stdc++.h>
using namespace std;
const int N = 200000 + 1067;
int a[N];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n, nn, mm, k;
  cin >> n >> nn >> mm >> k;
  string s;
  cin >> s;
  for (int i = 1; i <= n; i++)
    if (s[i - 1] == '0')
      a[i] = 0;
    else
      a[i] = 1;
  int dem = 0;
  int last = 0;
  --nn;
  a[n + 1] = 1;
  for (int i = 1; i <= n + 1; i++)
    if (a[i] == 1) {
      dem += (i - last - 1) / mm;
      last = i;
    }
  cout << dem - nn << endl;
  last = 0;
  for (int i = 1; i <= n; i++) {
    if (dem == nn) break;
    if (a[i] == 0)
      if (i - last >= mm) {
        last = i;
        cout << i << " ";
        --dem;
      } else
        ;
    else if (a[i] == 1)
      last = i;
  }
  return 0;
}
