C1111133313331323223313331333133313311211111211331333131133133311233321   >>    C111113331333132322331333133313331331121111121133133313113313331123332   <<    C1111133313331323223313331333133313311211111211331333131133133311233323   >>      C1111133313331323223313331333133313311211111211331333131133133311233322   >>