C11112331312111112111133133313331333132323213331333132233132312313221   >>    C1111233131211111211113313331333133313232321333133313223313231231322   <<    C11112331312111112111133133313331333132323213331333132233132312313223   >>      C11112331312111112111133133313331333132323213331333132233132312313222   >>