-ic b-u bbb bbc bbi bbl bbu bcb bcc bci bcl bcu bi- bib bic bii bil biu blb blc bli bll blu bub buc bui bul buu c-- cbb cbc cbi cbl cbu ccb ccc cci ccl ccu ci- cib cic cii cil ciu cl- clb clc cli cll clu cub cuc cui cul cuu ibb ibc ibi ibl ibu icb icc ici icl icu iib iic iii iil iiu il- ilb ilc ili ill ilu iu- iub iuc iui lbb lbc lbi lbl lbu lcb lcc lci lcl lcu lib lic lii lil liu llb llc lli lll llu lub luc lui lul luu ubb ubc ubi ubl ubu ucb ucc uci ucl ucu uib uic uii uil uiu ulb ulc uli ull ulu uuc uuu