C1311213331333132332133313331333133313331333131333132233313112121   >>    C131121333133313233213331333133313331333133313133313223331311212   <<    C1311213331333132332133313331333133313331333131333132233313112123   >>      C1311213331333132332133313331333133313331333131333132233313112122   >>