C1311213331333132332133313331333133313331333131121133132233312121   >>    C131121333133313233213331333133313331333133313112113313223331212   <<    C1311213331333132332133313331333133313331333131121133132233312123   >>      C1311213331333132332133313331333133313331333131121133132233312122   >>