#include <bits/stdc++.h>
using namespace std;
char s[200005];
bool vis[200005];
vector<int> ve;
int main() {
  int n, a, b, k;
  scanf("%d%d%d%d", &n, &a, &b, &k);
  scanf("%s", s);
  int m = strlen(s);
  int f = 0;
  for (int i = 0; i < m; i++) {
    if (s[i] == '1') {
      vis[i] = true;
      f = 1;
    }
  }
  int now = 0, sum = 0;
  for (int i = 0; i < m; i++) {
    if (!vis[i]) now++;
    if (vis[i]) now = 0;
    if (now == b) {
      now = 0;
      sum++;
      ve.push_back(i + 1);
    }
  }
  printf("%d\n", sum - a + 1);
  for (int i = 0; i <= sum - a; i++) {
    printf("%d ", ve[i]);
  }
  cout << endl;
  return 0;
}
