#include <bits/stdc++.h>
using namespace std;
void deba(int* a, int n) {
  cerr << "| ";
  for (int i = 0; i < (n); i++) cerr << a[i] << " ";
  cerr << "|" << endl;
}
inline bool EQ(double a, double b) { return fabs(a - b) < 1e-9; }
const int INF = 1 << 30;
char s[223456];
int main() {
  int len, n;
  scanf("%d %d", &len, &n);
  ;
  int b, m;
  scanf("%d %d", &b, &m);
  ;
  scanf("%s", s);
  s[len++] = '1';
  int cnt = 0;
  vector<int> k;
  for (int i = 0; i < (len); i++) {
    if (s[i] == '0')
      cnt++;
    else {
      cnt = 0;
    }
    if (cnt != 0 && cnt % b == 0) k.push_back(i + 1);
  }
  cout << k.size() - n + 1 << endl;
  for (int i = 0; i < (k.size() - n + 1); i++) printf("%d ", k[i]);
  cout << endl;
  return 0;
}
