-er -ol bbb bbe bbg bbl bbo bbr bbs bbt be- beb bee beg bel beo ber bes bet bgb bge bgg bgl bgo bgr bgs bgt blb ble blg bll blo blr bls blt bob boe bog bol boo bor bos bot brb bre brg brl bro brr brs brt bsb bse bsg bsl bso bsr bss bst btb bte btg btl bto btr bts btt ebb ebe ebg ebl ebo ebr ebs ebt eeb eee eeg eel eeo eer ees eet egb ege egg egl ego egr egs egt elb ele elg ell elo elr els elt eo- eob eoe eog eol eoo eor eos eot erb ere erg erl ero err ers ert es- esb ese esg esl eso esr ess est etb ete etg etl eto etr ets ett gbe gbg gbl gbo gbr gbs gbt ge- geb gee geg gel geo ger ges get ggb ggg ggo ggr ggs ggt glb gle glg gll glo glr gls glt gob goe gog gol goo gor gos got grb gre grg grl gro grr grs grt gsb gse gsg gsl gso gsr gss gst gtb gte gtg gtl gto gtr gts gtt lbb lbe lbg lbl lbo lbr lbs lbt leb lee leg lel leo ler les let lgb lge lgg lgl lgo lgr lgs lgt llb lle llg lll llo llr lls llt lob loe log lol loo lor los lot lrb lrg lro lrr lrs lrt lsb lse lsg lsl lso lsr lss lst ltb lte ltg ltl lto ltr lts ltt ob- obb obe obg obl obo obr obs obt oeb oee oeg oel oeo oer oes oet oge ogg ogl ogo ogs ogt olb ole olg oll olo ols olt oo- oob oog ool ooo oor oos oot or- orb ore org orl oro orr ors ort os- osb ose osg osl oso osr oss ost ot- otb ote otg otl oto otr ots ott rbb rbe rbg rbl rbo rbr rbs rbt re- reb ree reg rel reo rer res ret rgb rge rgg rgo rgr rgs rgt rle rlg rll rlo rlr rls rlt rob roe rog rol roo ror ros rot rrb rrg rrl rrr rrs rrt rsb rse rsg rsl rso rsr rss rst rtb rte rtg rtl rto rtr rts rtt sbb sbe sbg sbl sbo sbr sbs sbt se- seb see seg sel seo ser ses set sgb sge sgg sgl sgo sgr sgs sgt slb sle slg sll slo slr sls slt sob soe sog sol soo sor sos sot sr- srb sre srg srl sro srr srs srt ss- ssb sse ssg ssl sso ssr sss sst stb ste stg stl sto str sts stt tbb tbe tbg tbl tbo tbr tbs tbt te- teb tee teg tel teo ter tes tet tgb tge tgg tgl tgo tgr tgs tgt tle tlg tll tlo tlr tls tlt to- tob toe tog tol too tor tos tot trb tre trg trl tro trr trs trt tsb tse tsg tsl tso tsr tss tst ttb tte ttg ttl tto ttr tts ttt