C31232233133313221211113313331333133313311211231211113313222121   >>    C3123223313331322121111331333133313331331121123121111331322212   <<    C31232233133313221211113313331333133313311211231211113313222123   >>      C31232233133313221211113313331333133313311211231211113313222122   >>