-er -ol bbb bbe bbg bbl bbn bbo bbr bbs be- beb bee beg bel ben beo ber bes bgb bge bgg bgl bgn bgo bgr bgs blb ble blg bll bln blo blr bls bnb bne bng bnl bnn bno bnr bns bob boe bog bol bon boo bor bos brb bre brg brl brn bro brr brs bsb bse bsg bsl bsn bso bsr bss ebb ebe ebg ebl ebn ebo ebr ebs eeb eee eeg eel een eeo eer ees egb ege egg egl egn ego egr egs elb ele elg ell eln elo elr els en- enb ene eng enl enn eno enr ens eo- eob eoe eog eol eon eoo eor eos erb ere erg erl ern ero err ers es- esb ese esg esl esn eso esr ess gbe gbg gbl gbn gbo gbr gbs ge- geb gee geg gel gen geo ger ges ggb ggg ggn ggo ggr ggs glb gle glg gll gln glo glr gls gnb gne gnl gnn gno gnr gns gob goe gog gol gon goo gor gos grb gre grg grl grn gro grr grs gsb gse gsg gsl gsn gso gsr gss lbb lbe lbg lbl lbo lbr lbs leb lee leg lel len leo ler les lgb lge lgg lgl lgn lgo lgr lgs llb lle llg lll lln llo llr lls lnb lne lng lnl lnn lno lnr lns lob loe log lol lon loo lor los lrb lrg lrn lro lrr lrs lsb lse lsg lsl lsn lso lsr lss nbb nbe nbg nbl nbn nbo nbr nbs ne- neb nee neg nel nen neo ner nes ngb nge ngg ngl ngn ngo ngs nlb nle nlg nll nln nlo nlr nls nnb nne nng nnl nnn nno nns no- nob noe nog nol non noo nor nos nrb nre nrg nrl nrn nro nrr nrs nsb nse nsg nsl nsn nso nsr nss ob- obb obe obg obl obn obo obr obs oeb oee oeg oel oen oeo oer oes oge ogg ogl ogn ogo ogs olb ole olg oll oln olo ols on- onb one ong onl onn ono onr ons oo- oob oog ool oon ooo oor oos or- orb ore org orl orn oro orr ors os- osb ose osg osl osn oso osr oss rbb rbe rbg rbl rbn rbo rbr rbs re- reb ree reg rel ren reo rer res rgb rge rgg rgn rgo rgr rgs rle rlg rll rln rlo rlr rls rnb rng rnn rno rnr rns rob roe rog rol ron roo ror ros rrb rrg rrl rrn rrr rrs rsb rse rsg rsl rsn rso rsr rss sbb sbe sbg sbl sbn sbo sbr sbs se- seb see seg sel sen seo ser ses sgb sge sgg sgl sgn sgo sgr sgs slb sle slg sll sln slo slr sls snb sne sng snl snn sno snr sns sob soe sog sol son soo sor sos sr- srb sre srg srl srn sro srr srs ss- ssb sse ssg ssl ssn sso ssr sss