C11112331312111112111133133313331333132323213331333133313331311222312321   >>    C1111233131211111211113313331333133313232321333133313331333131122231232   <<    C11112331312111112111133133313331333132323213331333133313331311222312323   >>      C11112331312111112111133133313331333132323213331333133313331311222312322   >>