C3123121111113313121111331333131211111333131133132233132322121221   >>    C312312111111331312111133133313121111133313113313223313232212122   <<    C3123121111113313121111331333131211111333131133132233132322121223   >>      C3123121111113313121111331333131211111333131133132233132322121222   >>