-ic b-u bbb bbc bbi bbl bbn bbr bbu bcb bcc bci bcl bcn bcr bcu bi- bib bic bii bil bin bir biu blb blc bli bll bln blr blu bnb bnc bni bnl bnn bnr bnu brb bri brl brn brr bru bub buc bui bul bun bur buu c-- cbb cbc cbi cbl cbn cbr cbu ccb ccc cci ccl ccn ccr ccu ci- cib cic cii cil cin cir ciu cl- clb clc cli cll cln clr clu cn- cnb cnc cni cnl cnn cnr cnu crb crc cri crl crn crr cru cub cuc cui cul cun cur cuu ibb ibc ibi ibl ibn ibr ibu icb icc ici icl icn icr icu iib iic iii iil iin iir iiu il- ilb ilc ili ill iln ilr ilu in- inb inc ini inl inn inr inu ir- irb irc iri irl irn irr iru iu- iub iuc iui iur lbb lbc lbi lbl lbr lbu lcb lcc lci lcl lcn lcr lcu lib lic lii lil lin lir liu llb llc lli lll lln llr llu lnb lnc lni lnl lnn lnr lnu lrb lrc lri lrn lrr lru lub luc lui lul lun lur luu n-i nbb nbc nbi nbl nbn nbr nbu ncb ncc nci ncl ncn ncr ncu nib nic nii nil nin nir niu nlb nlc nli nll nln nlr nlu nnb nnc nni nnl nnn nnu nrb nrc nri nrl nrn nrr nru nub nuc nui nul nun nur nuu rbb rbc rbi rbl rbn rbr rbu rcb rcc rci rcl rcn rcr rcu rib ric rii ril rin rir rlc rli rll rln rlr rlu rnb rnc rni rnn rnr rnu rrb rrc rri rrl rrn rrr rru rub ruc rui run rur ruu ubb ubc ubi ubl ubn ubr ubu ucb ucc uci ucl ucn ucr ucu uib uic uii uil uin uir uiu ulb ulc uli ull uln ulr ulu un- unb unc uni unl unn unr unu ur- urb urc uri url urn urr uru uuc uun uur uuu