-ic b-u bbb bbc bbi bbl bbu bcb bcc bci bcl bcu bcz bi- bib bic bii bil biu biz blb blc bli bll blu blz bub buc bui bul buu buz bzu bzz c-- cbb cbc cbi cbl cbu cbz ccb ccc cci ccl ccu ccz ci- cib cic cii cil ciu cl- clb clc cli cll clu clz cub cuc cui cul cuu cuz cz- czc ibb ibc ibi ibl ibu ibz icb icc ici icl icu icz iib iic iii iil iiu il- ilb ilc ili ill ilu ilz iu- iub iuc iui iuz izi izu izz lbb lbc lbi lbl lbu lcb lcc lci lcl lcu lib lic lii lil liu liz llb llc lli lll llu llz lub luc lui lul luu luz lzi lzu ubb ubc ubi ubl ubu ucb ucc uci ucl ucu uib uic uii uil uiu ulb ulc uli ull ulu uuc uuu uzb uzi uzu zbb zbc zbl zcl zib zil ziz zub zuc zui zul zuz zzz