#include <bits/stdc++.h>
using namespace std;
using ull = unsigned long long;
int main() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  int cnt = 0;
  vector<int> v;
  for (int i = 1; i <= n; i++) {
    if (s[i - 1] == '1') {
      cnt = 0;
    } else {
      cnt++;
      if (cnt % b == 0) v.push_back(i);
    }
  }
  int ans = v.size();
  ans = max(0, ans - a + 1);
  printf("%d\n", ans);
  for (int i = 0; i < ans; i++) {
    printf("%d ", v[i]);
  }
  printf("\n");
}
