#include <bits/stdc++.h>
using namespace std;
int n, a, b, k, ans[2 * 100000 + 5];
char s[2 * 100000 + 5];
int main() {
  scanf("%d%d%d%d%s", &n, &a, &b, &k, s + 1);
  int cnt = 0, bt = 0;
  for (int i = 1; i <= n; ++i) {
    if (s[i] == '0')
      ++cnt;
    else
      cnt = 0;
    if (cnt == b) ans[++bt] = i, cnt = 0;
  }
  printf("%d\n", bt - a + 1);
  for (int i = 1; i <= bt - a + 1; ++i) printf("%d ", ans[i]);
}
