#include <bits/stdc++.h>
const int MAXN = 2e5 + 10;
const long long p = 1e9 + 7;
using namespace std;
int n, a, b, k;
string s;
void run() {
  cin >> n >> a >> b >> k;
  cin >> s;
  int l = -1, x = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == '1') {
      x += (i - l - 1) / b;
      l = i;
    }
  }
  x += (n - l - 1) / b;
  vector<int> v;
  for (int j, i = 0; i < n && x >= a; i = j) {
    int f = 1;
    for (j = i; j < i + b; j++) {
      if (s[j] == '1') {
        f = 0;
        j++;
        break;
      }
    }
    if (f) {
      v.push_back(j);
      x--;
    }
  }
  cout << v.size() << '\n';
  for (int i : v) {
    cout << i << " ";
  }
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  run();
  return 0;
}
