C1111233131211111211113313331333133313311221333131133132233213321   >>    C111123313121111121111331333133313331331122133313113313223321332   <<    C1111233131211111211113313331333133313311221333131133132233213323   >>      C1111233131211111211113313331333133313311221333131133132233213322   >>