-er bbb bbe bbg bbl bbn bbr be- beb bee beg bel ben ber bez bgb bge bgg bgl bgn bgr bgz blb ble blg bll bln blr blz bnb bne bng bnl bnn bnr bnz brb bre brg brl brn brr brz bze bzn bzr bzz ebb ebe ebg ebl ebn ebr eeb eee eeg eel een eer egb ege egg egl egn egr elb ele elg ell eln elr elz en- enb ene eng enl enn enr enz erb ere erg erl ern err erz eze ezr ezz gbe gbg gbl gbn gbr gbz ge- geb gee geg gel gen ger gez ggb ggg ggn ggr ggz glb gle glg gll gln glr glz gnb gne gnl gnn gnr grb gre grg grl grn grr gzr lbb lbe lbg lbl lbr leb lee leg lel len ler lez lgb lge lgg lgl lgn lgr llb lle llg lll lln llr llz lnb lne lng lnl lnn lnr lrb lrg lrn lrr lrz lzr nbb nbe nbg nbl nbn nbr ne- neb nee neg nel nen ner nez ngb nge ngg ngl ngn nlb nle nlg nll nln nlr nlz nnb nne nng nnl nnn nnz nrb nre nrg nrl nrn nrr nrz nzb nze nzg nzz rbb rbe rbg rbl rbn rbr re- reb ree reg rel ren rer rez rgb rge rgg rgn rgr rle rlg rll rln rlr rnb rng rnn rnr rnz rrb rrg rrl rrn rrr rzb rze z-g zbb zbl zbr zeb zee zel zen zer zez zgb zgg zlr zne znn zrl zzr zzz