C13112133313331323321333133313331333133313113313331333131231221   >>    C1311213331333132332133313331333133313331311331333133313123122   <<    C13112133313331323321333133313331333133313113313331333131231223   >>      C13112133313331323321333133313331333133313113313331333131231222   >>