C31232233133313221211113313331333133313311211231211113313113313222212121   >>    C3123223313331322121111331333133313331331121123121111331311331322221212   <<    C31232233133313221211113313331333133313311211231211113313113313222212123   >>      C31232233133313221211113313331333133313311211231211113313113313222212122   >>