C132233133112121111331333133313331333132313231332133313112211231212121   >>    C13223313311212111133133313331333133313231323133213331311221123121212   <<    C132233133112121111331333133313331333132313231332133313112211231212123   >>      C132233133112121111331333133313331333132313231332133313112211231212122   >>