C1111133313331323223313331333133313331333232233133112111133132333111   >>    C111113331333132322331333133313331333133323223313311211113313233311   <<    C1111133313331323223313331333133313331333232233133112111133132333113   >>      C1111133313331323223313331333133313331333232233133112111133132333112   >>