#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, a, b, k;
  cin >> n >> a >> b >> k;
  string s;
  cin >> s;
  vector<int> v;
  int pre = -1;
  vector<int> ee;
  vector<int> ss;
  for (int i = 0; i < n; i++) {
    if (s[i] == '1') {
      if (i - pre - 1 > 0) {
        v.push_back(i - pre - 1);
        ee.push_back(i - 1);
        ss.push_back(pre + 1);
      }
      pre = i;
    }
  }
  if (n - pre - 1 > 0) {
    v.push_back(n - pre - 1);
    ee.push_back(n - 1);
    ss.push_back(pre + 1);
  }
  int total = 0;
  for (auto &e : v) {
    e /= b;
    total += e;
  }
  assert(total >= a);
  cout << total - a + 1 << endl;
  int cc = total - a + 1;
  vector<int> ans;
  for (int i = 0; i < ss.size(); i++) {
    int j = ss[i] + b - 1;
    while (j <= ee[i] && cc) {
      ans.push_back(j);
      cc--;
      j += b;
    }
  }
  for (int i = 0; i < ans.size(); i++) {
    printf("%d ", ans[i] + 1);
  }
  cout << endl;
}
