Cool initialization test

Class Mutual inherits IO {
  a : Int <- b;
  b : Int <- a;
  out() : Object { {
    out_int(a);
    out_int(b);
    out_string("\n");
  }};
};

Class After inherits IO {
  a : Int <- 5;
  b : Int <- a;
  out() : Object { {
    out_int(a);
    out_int(b);
    out_string("\n");
  }};
};

Class Before inherits IO{
  a : Int <- b;
  b : Int <- 5;
  out() : Object { {
    out_int(a);
    out_int(b);
    out_string("\n");
  }};
};

Class Main {
  main() : Object {{
    (new Mutual).out();
    (new After).out();
    (new Before).out();
  }};
};