C3123121111113313121111331333133313221333131231211113313223322321   >>    C312312111111331312111133133313331322133313123121111331322332232   <<    C3123121111113313121111331333133313221333131231211113313223322323   >>      C3123121111113313121111331333133313221333131231211113313223322322   >>