-er -ol bbb bbe bbg bbl bbo bbr bbs be- beb bee beg bel beo ber bes bgb bge bgg bgl bgo bgr bgs bjg bjj bjr bjs blb ble blg blj bll blo blr bls bob boe bog boj bol boo bor bos brb bre brg brj brl bro brr brs bsb bse bsg bsj bsl bso bsr bss ebb ebe ebg ebj ebl ebo ebr ebs eeb eee eeg eel eeo eer ees egb ege egg egl ego egr egs ejl ejo elb ele elg ell elo elr els eo- eob eoe eog eol eoo eor eos erb ere erg erl ero err ers es- esb ese esg esl eso esr ess gbe gbg gbj gbl gbo gbr gbs ge- geb gee geg gel geo ger ges ggb ggg ggj ggo ggr ggs gje gjg gjr glb gle glg glj gll glo glr gls gob goe gog gol goo gor gos grb gre grg grj grl gro grr grs gsb gse gsg gsj gsl gso gsr gss jbg jbj jbl jbo jbr jbs jeb jee jeg jej jel jeo jer jes jgb jge jgo jgr jgs jjb jjg jjj jjl jjr jjs jlb jle jlg jll jlo jlr jls job joe jog joj jol joo jor jos jrb jrg jrl jro jrr jrs jsb jse jsg jsj jsl jso jsr jss lbb lbe lbg lbj lbl lbo lbr lbs leb lee leg lej lel leo ler les lgb lge lgg lgj lgl lgo lgr lgs lje ljj ljs llb lle llg llj lll llo llr lls lob loe log loj lol loo lor los lrb lrg lro lrr lrs lsb lse lsg lsj lsl lso lsr lss ob- obb obe obg obj obl obo obr obs oeb oee oeg oel oeo oer oes oge ogg ogl ogo ogs ojb oje ojo ojs olb ole olg oll olo ols oo- oob oog ool ooo oor oos or- orb ore org orl oro orr ors os- osb ose osg osj osl oso osr oss rbb rbe rbg rbl rbo rbr rbs re- reb ree reg rel reo rer res rgb rge rgg rgo rgr rgs rjg rjr rle rlg rll rlo rlr rls rob roe rog roj rol roo ror ros rrb rrg rrl rrr rrs rsb rse rsg rsj rsl rso rsr rss sbb sbe sbg sbj sbl sbo sbr sbs se- seb see seg sej sel seo ser ses sgb sge sgg sgl sgo sgr sgs sjb sje sjj sjr sjs slb sle slg slj sll slo slr sls sob soe sog soj sol soo sor sos sr- srb sre srg srj srl sro srr srs ss- ssb sse ssg ssj ssl sso ssr sss