-er bbb bbe bbg bbl bbn bbr be- beb bee beg bel ben ber bgb bge bgg bgl bgn bgr blb ble blg bll bln blr bnb bne bng bnl bnn bnr brb bre brg brl brn brr ebb ebe ebg ebl ebn ebr eeb eee eeg eel een eer egb ege egg egl egn egr elb ele elg ell eln elr en- enb ene eng enl enn enr erb ere erg erl ern err gbe gbg gbl gbn gbr ge- geb gee geg gel gen ger ggb ggg ggn ggr glb gle glg gll gln glr gnb gne gnl gnn gnr grb gre grg grl grn grr lbb lbe lbg lbl lbr leb lee leg lel len ler lgb lge lgg lgl lgn lgr llb lle llg lll lln llr lnb lne lng lnl lnn lnr lrb lrg lrn lrr nbb nbe nbg nbl nbn nbr ne- neb nee neg nel nen ner ngb nge ngg ngl ngn nlb nle nlg nll nln nlr nnb nne nng nnl nnn nrb nre nrg nrl nrn nrr rbb rbe rbg rbl rbn rbr re- reb ree reg rel ren rer rgb rge rgg rgn rgr rle rlg rll rln rlr rnb rng rnn rnr rrb rrg rrl rrn rrr