-ic b-u bbb bbc bbe bbi bbk bbl bbu bcb bcc bce bci bck bcl bcu be- beb bec bee bei bek bel beu bi- bib bic bie bii bik bil biu bkb bkc bke bkk bkl blb blc ble bli blk bll blu bub buc bue bui buk bul buu c-- cbb cbc cbe cbi cbk cbl cbu ccb ccc cce cci cck ccl ccu ce- ceb cec cee cei cek cel ceu ci- cib cic cie cii cik cil ciu ckb ckc cki cl- clb clc cle cli clk cll clu cub cuc cue cui cuk cul cuu ebb ebc ebe ebi ebk ebl ebu ec- ecb ecc ece eci eck ecl ecu eeb eec eee eek eel eib eic eie eii eik eil eiu ekb ekc eke eki ekl eku elb elc ele eli elk ell elu eu- eub euc eue eui eul ibb ibc ibe ibi ibk ibl ibu icb icc ice ici ick icl icu ie- iec iee iei iek iel iib iic iie iii iil iiu ikb ikc ike iki ikk ikl iku il- ilb ilc ile ili ilk ill ilu iu- iub iuc iue iui kbb kbc kbe kbi kbk kbl kbu kcb kcc kce kci kck kcl kcu ke- keb kec kee kei kek kel kib kic kie kii kik kil kiu kkb kkc kke kki kkk kkl kku kl- klb klc kli klu kub kuc kue kui kuk kul kuu lbb lbc lbe lbi lbk lbl lbu lcb lcc lce lci lck lcl lcu leb lec lee lei lek lel leu lib lic lie lii lik lil liu lkb lkl llb llc lle lli llk lll llu lub luc lue lui luk lul luu ubb ubc ube ubi ubk ubl ubu ucb ucc uce uci uck ucl ucu ueb uec uee uei uel uib uic uie uii uil uiu ukb ukc uke uki ukk ukl uku ulb ulc ule uli ulk ull ulu uuc uue uuu