C1111133313331323223313331333133313331333232233133112111112213233231   >>    C111113331333132322331333133313331333133323223313311211111221323323   <<    C1111133313331323223313331333133313331333232233133112111112213233233   >>      C1111133313331323223313331333133313331333232233133112111112213233232   >>