C13223313311212111133133313331333133313232233133313311211111133132212121   >>    C1322331331121211113313331333133313331323223313331331121111113313221212   <<    C13223313311212111133133313331333133313232233133313311211111133132212123   >>      C13223313311212111133133313331333133313232233133313311211111133132212122   >>