C11112331312111112111133133313331333132323213331333133313331311211233112321   >>    C1111233131211111211113313331333133313232321333133313331333131121123311232   <<    C11112331312111112111133133313331333132323213331333133313331311211233112323   >>      C11112331312111112111133133313331333132323213331333133313331311211233112322   >>