C11112331312111112111133133313331333133313223223313112211232313233232321   >>    C1111233131211111211113313331333133313331322322331311221123231323323232   <<    C11112331312111112111133133313331333133313223223313112211232313233232323   >>      C11112331312111112111133133313331333133313223223313112211232313233232322   >>