-er b-u bbb bbe bbg bbk bbl bbn bbr bbu be- beb bee beg bek bel ben ber beu bgb bge bgg bgk bgl bgn bgr bgu bkb bke bkg bkk bkl bkn bkr blb ble blg blk bll bln blr blu bnb bne bng bnk bnl bnn bnr bnu brb bre brg brk brl brn brr bru bub bue bug buk bul bun bur buu ebb ebe ebg ebk ebl ebn ebr ebu eeb eee eeg eek eel een eer egb ege egg egl egn egr egu ekb eke ekg ekl ekr eku elb ele elg elk ell eln elr elu en- enb ene eng enk enl enn enr enu erb ere erg erk erl ern err eru eu- eub eue eug eul eun eur gbe gbg gbk gbl gbn gbr gbu ge- geb gee geg gek gel gen ger geu ggb ggg ggn ggr ggu gkb gkn glb gle glg glk gll gln glr glu gnb gne gnl gnn gnr gnu grb gre grg grk grl grn grr gru gu- gub gue gug guk gul gun gur guu kbb kbe kbk kbl kbn kbr kbu ke- keb kee keg kek kel ken ker kgb kgl kgu kkb kke kkk kkl kkn kkr kku kl- klb klg klr klu kn- kne kng knk knl knn knr knu krg krk krl krn krr kru kub kue kug kuk kul kun kur kuu lbb lbe lbg lbk lbl lbr lbu leb lee leg lek lel len ler leu lgb lge lgg lgk lgl lgn lgr lgu lkb lkg lkl lkr llb lle llg llk lll lln llr llu lnb lne lng lnk lnl lnn lnr lnu lrb lrg lrk lrn lrr lru lub lue lug luk lul lun lur luu nbb nbe nbg nbk nbl nbn nbr nbu ne- neb nee neg nek nel nen ner neu ngb nge ngg ngk ngl ngn ngu nke nkk nkn nkr nku nlb nle nlg nlk nll nln nlr nlu nnb nne nng nnk nnl nnn nnu nrb nre nrg nrk nrl nrn nrr nru nub nue nug nuk nul nun nur nuu rbb rbe rbg rbk rbl rbn rbr rbu re- reb ree reg rek rel ren rer reu rgb rge rgg rgk rgn rgr rkb rke rkg rkk rku rle rlg rll rln rlr rlu rnb rng rnn rnr rnu rrb rrg rrk rrl rrn rrr rru rub rue rug ruk run rur ruu ubb ube ubg ubk ubl ubn ubr ubu ueb uee ueg uel uen uer ugb uge ugg ugk ugl ugn ugr ugu ukb uke ukk ukl ukn ukr uku ulb ule ulg ulk ull uln ulr ulu un- unb une ung unk unl unn unr unu ur- urb ure urg urk url urn urr uru uue uug uun uur uuu