#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  int kol = 0;
  int time = 0;
  for (int i = 0; i < n; ++i) {
    ++time;
    if (s[i] == '1') time = 0;
    if (time == b) {
      ++kol;
      time = 0;
    }
  }
  cout << kol - a + 1 << '\n';
  bool strike = false;
  time = 0;
  for (int i = 0; i < n && !strike; ++i) {
    ++time;
    if (s[i] == '1') time = 0;
    if (time == b) {
      cout << i + 1 << " ";
      --kol;
      time = 0;
    }
    if (kol < a) strike = true;
  }
}
