C11112331312111112111133133313331333133313223223313121111133222321   >>    C1111233131211111211113313331333133313331322322331312111113322232   <<    C11112331312111112111133133313331333133313223223313121111133222323   >>      C11112331312111112111133133313331333133313223223313121111133222322   >>