C1111133313331323223313331333133313311211111211331333131211111333133112211111   >>    C111113331333132322331333133313331331121111121133133313121111133313311221111   <<    C1111133313331323223313331333133313311211111211331333131211111333133112211113   >>      C1111133313331323223313331333133313311211111211331333131211111333133112211112   >>