-ic b-u bbb bbc bbi bbk bbl bbn bbu bcb bcc bci bck bcl bcn bcu bi- bib bic bii bik bil bin biu bkb bkc bkk bkl bkn blb blc bli blk bll bln blu bnb bnc bni bnk bnl bnn bnu bub buc bui buk bul bun buu c-- cbb cbc cbi cbk cbl cbn cbu ccb ccc cci cck ccl ccn ccu ci- cib cic cii cik cil cin ciu ckb ckc cki cl- clb clc cli clk cll cln clu cn- cnb cnc cni cnl cnn cnu cub cuc cui cuk cul cun cuu ibb ibc ibi ibk ibl ibn ibu icb icc ici ick icl icn icu iib iic iii iil iin iiu ikb ikc iki ikk ikl iku il- ilb ilc ili ilk ill iln ilu in- inb inc ini ink inl inn inu iu- iub iuc iui kbb kbc kbi kbk kbl kbn kbu kcb kcc kci kck kcl kcn kcu kib kic kii kik kil kin kiu kkb kkc kki kkk kkl kkn kku kl- klb klc kli klu kn- knc kni knk knl knn knu kub kuc kui kuk kul kun kuu lbb lbc lbi lbk lbl lbu lcb lcc lci lck lcl lcn lcu lib lic lii lik lil lin liu lkb lkl llb llc lli llk lll lln llu lnb lnc lni lnk lnl lnn lnu lub luc lui luk lul lun luu n-i nbb nbc nbi nbk nbl nbn nbu ncb ncc nci nck ncl ncn ncu nib nic nii nik nil nin niu nkc nki nkk nkn nku nlb nlc nli nlk nll nln nlu nnb nnc nni nnk nnl nnn nnu nub nuc nui nuk nul nun nuu ubb ubc ubi ubk ubl ubn ubu ucb ucc uci uck ucl ucn ucu uib uic uii uil uin uiu ukb ukc uki ukk ukl ukn uku ulb ulc uli ulk ull uln ulu un- unb unc uni unk unl unn unu uuc uun uuu