-ic b-u bbb bbc bbe bbf bbg bbi bbk bbl bbu bcb bcc bce bcf bcg bci bck bcl bcu be- beb bec bee bef beg bei bek bel beu bfb bfc bfe bff bfg bfi bfl bfu bgb bgc bge bgf bgg bgi bgk bgl bgu bi- bib bic bie bif big bii bik bil biu bkb bkc bke bkf bkg bkk bkl blb blc ble blf blg bli blk bll blu bub buc bue buf bug bui buk bul buu c-- cbb cbc cbe cbf cbg cbi cbk cbl cbu ccb ccc cce ccf ccg cci cck ccl ccu ce- ceb cec cee cef ceg cei cek cel ceu cfb cfc cfe cff cfg cfi cfk cfl cfu cgb cgc cge cgg cgi cgl cgu ci- cib cic cie cif cig cii cik cil ciu ckb ckc cki cl- clb clc cle clf clg cli clk cll clu cub cuc cue cuf cug cui cuk cul cuu ebb ebc ebe ebf ebg ebi ebk ebl ebu ec- ecb ecc ece ecf ecg eci eck ecl ecu eeb eec eee eef eeg eek eel ef- efb efc efe eff efg efi efl egb egc ege egf egg egi egl egu eib eic eie eif eig eii eik eil eiu ekb ekc eke ekf ekg eki ekl eku elb elc ele elf elg eli elk ell elu eu- eub euc eue euf eug eui eul fbb fbc fbe fbf fbg fbi fbk fbl fbu fcb fcc fce fcf fcg fci fck fcl fcu feb fec fee fef feg fei fek fel feu ffc ffe fff ffg ffi ffk ffl ffu fgb fgc fge fgf fgg fgi fgl fib fic fie fif fig fii fik fil fiu fkb fkc fkf fkg fki fkk fkl flb flc fle flf flg fli fll flu fub fue fuf fug fui fuk ful fuu gbc gbe gbf gbg gbi gbk gbl gbu gcb gcc gce gcf gcg gci gck gcl gcu ge- geb gec gee gef geg gei gek gel geu gfb gfc gfe gff gfi gfk gfl ggb ggc ggg ggi ggu gib gic gie gif gig gii gik gil giu gkb glb glc gle glf glg gli glk gll glu gu- gub guc gue guf gug gui guk gul guu i-f ibb ibc ibe ibf ibg ibi ibk ibl ibu icb icc ice icf icg ici ick icl icu ie- iec iee ief ieg iei iek iel ifb ifc ife iff ifg ifi ifl ifu igb igc ige igf igg igi igk igl igu iib iic iie iif iii iil iiu ikb ikc ike ikf iki ikk ikl iku il- ilb ilc ile ilf ilg ili ilk ill ilu iu- iub iuc iue iug iui kbb kbc kbe kbf kbi kbk kbl kbu kcb kcc kce kcg kci kck kcl kcu ke- keb kec kee kef keg kei kek kel kfc kff kfg kfi kfu kgb kgc kgf kgi kgl kgu kib kic kie kif kig kii kik kil kiu kkb kkc kke kki kkk kkl kku kl- klb klc klf klg kli klu kub kuc kue kug kui kuk kul kuu lbb lbc lbe lbf lbg lbi lbk lbl lbu lcb lcc lce lcf lcg lci lck lcl lcu leb lec lee lef leg lei lek lel leu lfb lfc lfe lff lfg lfi lfk lfl lfu lgb lgc lge lgf lgg lgi lgk lgl lgu lib lic lie lif lig lii lik lil liu lkb lkg lkl llb llc lle llf llg lli llk lll llu lub luc lue luf lug lui luk lul luu ubb ubc ube ubf ubg ubi ubk ubl ubu ucb ucc uce ucf ucg uci uck ucl ucu ueb uec uee uef ueg uei uel ufc ufe uff ufg ufi ufl ufu ugb ugc uge ugf ugg ugi ugk ugl ugu uib uic uie uif uig uii uil uiu ukb ukc uke ukf uki ukk ukl uku ulb ulc ule ulf ulg uli ulk ull ulu uuc uue uug uuu