#include <bits/stdc++.h>
using namespace std;
long long n, a, b, k;
vector<char> x;
void read() {
  cin >> n >> a >> b >> k;
  x.resize(n);
  for (long long i = 0; i < n; i++) {
    cin >> x[i];
  }
}
vector<long long> ans;
void run() {
  long long cnt1 = 0, cnt2 = 0;
  for (long long i = n - 1; i >= 0; i--) {
    if (x[i] == '0')
      cnt2++;
    else {
      cnt2 = 0;
      continue;
    }
    if (cnt1 < a) {
      x[i] = 'x';
    }
    if (cnt2 % b == 0) cnt1++;
  }
  cout << endl;
  cnt1 = 0, cnt2 = 0;
  for (long long i = 0; i < n; i++) {
    if (x[i] == '0')
      cnt2++;
    else {
      cnt2 = 0;
      cnt1 = 0;
      continue;
    }
    if (cnt2 % b == 0) {
      ans.push_back(i + 1);
    }
  }
  for (long long i = 0; i < n; i++)
    if (x[i] == 'x') {
      ans.push_back(i + 1);
      break;
    }
}
void write() {
  cout << ans.size() << endl;
  for (auto i : ans) cout << i << " ";
}
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  cout.tie(nullptr);
  read();
  run();
  write();
  return 0;
}
