C3123121111331311213331333131133133313331333133313232233132322231   >>    C312312111133131121333133313113313331333133313331323223313232223   <<    C3123121111331311213331333131133133313331333133313232233132322233   >>      C3123121111331311213331333131133133313331333133313232233132322232   >>