-er -ol bbb bbe bbk bbl bbo bbr bbs be- beb bee bek bel beo ber bes bjj bjk bjr bjs bkb bke bkk bkl bko bkr bks blb ble blj blk bll blo blr bls bob boe boj bok bol boo bor bos brb bre brj brk brl bro brr brs bsb bse bsj bsk bsl bso bsr bss ebb ebe ebj ebk ebl ebo ebr ebs eeb eee eek eel eeo eer ees ejl ejo ekb eke ekl eko ekr eks elb ele elk ell elo elr els eo- eob eoe eok eol eoo eor eos erb ere erk erl ero err ers es- esb ese esk esl eso esr ess jbj jbk jbl jbo jbr jbs jeb jee jej jek jel jeo jer jes jjb jjj jjk jjl jjr jjs jkb jkk jkl jko jkr jks jlb jle jll jlo jlr jls job joe joj jok jol joo jor jos jrb jrk jrl jro jrr jrs jsb jse jsj jsk jsl jso jsr jss kbb kbe kbk kbl kbo kbr kbs ke- keb kee kek kel keo ker kes kjb kje kjr kjs kkb kke kkk kkl kkr kks kl- klb klo klr kls kob koe kok kol koo kor kos krk krl kro krr krs ksb kse ksk ksl kso ksr kss lbb lbe lbj lbk lbl lbo lbr lbs leb lee lej lek lel leo ler les lje ljj ljs lkb lkl lkr lks llb lle llj llk lll llo llr lls lob loe loj lok lol loo lor los lrb lrk lro lrr lrs lsb lse lsj lsk lsl lso lsr lss ob- obb obe obj obk obl obo obr obs oeb oee oel oeo oer oes ojb oje ojo ojs okb oke okj okk okl oko okr oks olb ole olk oll olo ols oo- oob ook ool ooo oor oos or- orb ore ork orl oro orr ors os- osb ose osj osk osl oso osr oss rbb rbe rbk rbl rbo rbr rbs re- reb ree rek rel reo rer res rjk rjr rkb rke rkk rko rks rle rll rlo rlr rls rob roe roj rok rol roo ror ros rrb rrk rrl rrr rrs rsb rse rsj rsk rsl rso rsr rss sbb sbe sbj sbk sbl sbo sbr sbs se- seb see sej sek sel seo ser ses sjb sje sjj sjk sjr sjs sk- skb ske skj skk skl sko skr sks slb sle slj slk sll slo slr sls sob soe soj sok sol soo sor sos sr- srb sre srj srk srl sro srr srs ss- ssb sse ssj ssk ssl sso ssr sss