-er -ol b-u bbb bbe bbf bbg bbl bbo bbr bbs bbu be- beb bee bef beg bel beo ber bes beu bfb bfe bff bfg bfl bfo bfr bfs bfu bgb bge bgf bgg bgl bgo bgr bgs bgu blb ble blf blg bll blo blr bls blu bob boe bof bog bol boo bor bos bou brb bre brf brg brl bro brr brs bru bsb bse bsf bsg bsl bso bsr bss bsu bub bue buf bug bul buo bur bus buu ebb ebe ebf ebg ebl ebo ebr ebs ebu eeb eee eef eeg eel eeo eer ees ef- efb efe eff efg efl efo efr efs egb ege egf egg egl ego egr egs egu elb ele elf elg ell elo elr els elu eo- eob eoe eof eog eol eoo eor eos eou erb ere erf erg erl ero err ers eru es- esb ese esf esg esl eso esr ess esu eu- eub eue euf eug eul eur eus fbb fbe fbf fbg fbl fbo fbr fbs fbu feb fee fef feg fel feo fer fes feu ffe fff ffg ffl ffo ffr ffs ffu fgb fge fgf fgg fgl fgr fgs flb fle flf flg fll flo flr fls flu fob foe fof fog fol foo for fos fou frb fre frf frg frl fro frr frs fru fsb fse fsf fsg fsl fso fsr fss fsu fub fue fuf fug ful fuo fur fus fuu gbe gbf gbg gbl gbo gbr gbs gbu ge- geb gee gef geg gel geo ger ges geu gfb gfe gff gfl gfo gfr gfs ggb ggg ggo ggr ggs ggu glb gle glf glg gll glo glr gls glu gob goe gof gog gol goo gor gos gou grb gre grf grg grl gro grr grs gru gsb gse gsf gsg gsl gso gsr gss gsu gu- gub gue guf gug gul guo gur gus guu lbb lbe lbf lbg lbl lbo lbr lbs lbu leb lee lef leg lel leo ler les leu lfb lfe lff lfg lfl lfo lfr lfs lfu lgb lge lgf lgg lgl lgo lgr lgs lgu llb lle llf llg lll llo llr lls llu lob loe lof log lol loo lor los lou lrb lrf lrg lro lrr lrs lru lsb lse lsf lsg lsl lso lsr lss lsu lub lue luf lug lul luo lur lus luu ob- obb obe obf obg obl obo obr obs obu oeb oee oef oeg oel oeo oer oes of- ofb ofe off ofg ofl ofo ofr ofs ofu oge ogf ogg ogl ogo ogs olb ole olf olg oll olo ols olu oo- oob oof oog ool ooo oor oos or- orb ore orf org orl oro orr ors oru os- osb ose osf osg osl oso osr oss osu ou- oue ouf oul ouo our ous rbb rbe rbf rbg rbl rbo rbr rbs rbu re- reb ree ref reg rel reo rer res reu rfb rfe rff rfg rfl rfo rfr rfs rfu rgb rge rgf rgg rgo rgr rgs rle rlf rlg rll rlo rlr rls rlu rob roe rof rog rol roo ror ros rou rrb rrf rrg rrl rrr rrs rru rsb rse rsf rsg rsl rso rsr rss rsu rub rue ruf rug ruo rur rus ruu sbb sbe sbf sbg sbl sbo sbr sbs sbu se- seb see sef seg sel seo ser ses seu sfb sfe sff sfg sfl sfo sfr sfs sfu sgb sge sgf sgg sgl sgo sgr sgs sgu slb sle slf slg sll slo slr sls slu sob soe sof sog sol soo sor sos sou sr- srb sre srf srg srl sro srr srs ss- ssb sse ssf ssg ssl sso ssr sss ssu sub sue suf sug sul suo sur sus suu ubb ube ubf ubg ubl ubo ubr ubs ubu ueb uee uef ueg uel uer ues ufe uff ufg ufl ufo ufr ufs ufu ugb uge ugf ugg ugl ugo ugr ugs ugu ulb ule ulf ulg ull ulo ulr uls ulu uob uoe uog uol uoo uor uos ur- urb ure urf urg url uro urr urs uru usb use usf usg usl uso usr uss usu uue uug uur uus uuu