sclass RandomGuesser1 extends F1<S, S> {
  L<S> elements;
  
  *() {}
  *(L<S> *elements) {}
  
  S get(S s) {
    ret random(elements);
  }
}

static RandomGuesser1 randomGuesser1(SS examples) {
  ret RandomGuesser1(valuesList(examples));
}