C1111133313331323223313331333133313331333232233133112111112213233111   >>    C111113331333132322331333133313331333133323223313311211111221323311   <<    C1111133313331323223313331333133313331333232233133112111112213233113   >>      C1111133313331323223313331333133313331333232233133112111112213233112   >>