C31231211113311331323133313331333133313331333133313133313112121   >>    C3123121111331133132313331333133313331333133313331313331311212   <<    C31231211113311331323133313331333133313331333133313133313112123   >>      C31231211113311331323133313331333133313331333133313133313112122   >>