-er b-u bbb bbe bbg bbl bbn bbr bbu be- beb bee beg bel ben ber beu bgb bge bgg bgl bgn bgr bgu blb ble blg bll bln blr blu bnb bne bng bnl bnn bnr bnu brb bre brg brl brn brr bru bub bue bug bul bun bur buu ebb ebe ebg ebl ebn ebr ebu eeb eee eeg eel een eer egb ege egg egl egn egr egu elb ele elg ell eln elr elu en- enb ene eng enl enn enr enu erb ere erg erl ern err eru eu- eub eue eug eul eun eur gbe gbg gbl gbn gbr gbu ge- geb gee geg gel gen ger geu ggb ggg ggn ggr ggu glb gle glg gll gln glr glu gnb gne gnl gnn gnr gnu grb gre grg grl grn grr gru gu- gub gue gug gul gun gur guu lbb lbe lbg lbl lbr lbu leb lee leg lel len ler leu lgb lge lgg lgl lgn lgr lgu llb lle llg lll lln llr llu lnb lne lng lnl lnn lnr lnu lrb lrg lrn lrr lru lub lue lug lul lun lur luu nbb nbe nbg nbl nbn nbr nbu ne- neb nee neg nel nen ner neu ngb nge ngg ngl ngn ngu nlb nle nlg nll nln nlr nlu nnb nne nng nnl nnn nnu nrb nre nrg nrl nrn nrr nru nub nue nug nul nun nur nuu rbb rbe rbg rbl rbn rbr rbu re- reb ree reg rel ren rer reu rgb rge rgg rgn rgr rle rlg rll rln rlr rlu rnb rng rnn rnr rnu rrb rrg rrl rrn rrr rru rub rue rug run rur ruu ubb ube ubg ubl ubn ubr ubu ueb uee ueg uel uen uer ugb uge ugg ugl ugn ugr ugu ulb ule ulg ull uln ulr ulu un- unb une ung unl unn unr unu ur- urb ure urg url urn urr uru uue uug uun uur uuu