C13223313311212111133133313331333133313232233133313331323221211111122212121   >>    C1322331331121211113313331333133313331323223313331333132322121111112221212   <<    C13223313311212111133133313331333133313232233133313331323221211111122212123   >>      C13223313311212111133133313331333133313232233133313331323221211111122212122   >>