-er b-u bbb bbe bbg bbm bbn bbr bbu be- beb bee beg bem ben ber beu bgb bge bgg bgm bgn bgr bgu bmb bme bmg bmm bmn bmr bmu bnb bne bng bnn bnr bnu brb bre brg brm brn brr bru bub bue bug bum bun bur buu ebb ebe ebg ebm ebn ebr ebu eeb eee eeg eem een eer egb ege egg egm egn egr egu em- emb eme emg emm emn emr emu en- enb ene eng enm enn enr enu erb ere erg erm ern err eru eu- eub eue eug eun eur gbe gbg gbm gbn gbr gbu ge- geb gee geg gem gen ger geu ggb ggg ggm ggn ggr ggu gmb gme gmg gmm gmn gmr gnb gne gnm gnn gnr gnu grb gre grg grm grn grr gru gu- gub gue gug gum gun gur guu m-r mbb mbe mbg mbm mbr mbu meb mee meg mem men mer meu mgb mge mgm mgn mgr mgu mmb mme mmg mmm mmn mmr mmu mnb mne mng mnm mnn mnr mnu mrb mre mrg mrm mrn mrr mru mub mue mug mum mun mur muu nbb nbe nbg nbm nbn nbr nbu ne- neb nee neg nem nen ner neu ngb nge ngg ngm ngn ngu nmb nme nmg nmm nmn nmr nmu nnb nne nng nnm nnn nnu nrb nre nrg nrm nrn nrr nru nub nue nug num nun nur nuu rbb rbe rbg rbm rbn rbr rbu re- reb ree reg rem ren rer reu rgb rge rgg rgn rgr rmb rme rmg rmm rmn rmr rnb rng rnm rnn rnr rnu rrb rrg rrm rrn rrr rru rub rue rug rum run rur ruu ubb ube ubg ubn ubr ubu ueb uee ueg uem uen uer ugb uge ugg ugm ugn ugr ugu um- umb ume umg umm umn umr umu un- unb une ung unm unn unr unu ur- urb ure urg urm urn urr uru uue uug uum uun uur uuu