-er -ol bbb bbe bbh bbk bbl bbo bbr bbs be- beb bee beh bek bel beo ber bes bhb bhe bhh bhk bhl bho bhr bhs bkb bke bkk bkl bko bkr bks blb ble blh blk bll blo blr bls bob boe boh bok bol boo bor bos brb bre brh brk brl bro brr brs bsb bse bsh bsk bsl bso bsr bss ebb ebe ebh ebk ebl ebo ebr ebs eeb eee eek eel eeo eer ees ehb ehe ehh ehl eho ehr ehs ekb eke ekh ekl eko ekr eks elb ele elh elk ell elo elr els eo- eob eoe eoh eok eol eoo eor eos erb ere erh erk erl ero err ers es- esb ese esh esk esl eso esr ess hbb hbe hbh hbk hbl hbo hbr hbs he- heb hee heh hek hel heo her hes hhb hhe hhh hhk hhl hho hhr hhs hkb hkh hkk hkl hko hkr hks hlb hle hlh hll hlo hlr hls hob hoe hoh hok hol hoo hor hos hr- hrb hre hrh hrk hrl hro hrr hrs hsb hse hsh hsk hsl hsr hss kbb kbe kbh kbk kbl kbo kbr kbs ke- keb kee keh kek kel keo ker kes khe khh khk kho khr khs kkb kke kkh kkk kkl kkr kks kl- klb klh klo klr kls kob koe koh kok kol koo kor kos krk krl kro krr krs ksb kse ksh ksk ksl kso ksr kss lbb lbe lbh lbk lbl lbo lbr lbs leb lee leh lek lel leo ler les lhb lhh lhk lho lhr lhs lkb lkh lkl lkr lks llb lle llk lll llo llr lls lob loe loh lok lol loo lor los lrb lrh lrk lro lrr lrs lsb lse lsh lsk lsl lso lsr lss ob- obb obe obh obk obl obo obr obs oeb oee oeh oel oeo oer oes ohe ohh ohl oho ohr ohs okb oke okk okl oko okr oks olb ole olk oll olo ols oo- oob ooh ook ool ooo oor oos or- orb ore orh ork orl oro orr ors os- osb ose osh osk osl oso osr oss rbb rbe rbh rbk rbl rbo rbr rbs re- reb ree reh rek rel reo rer res rh- rhb rhe rhh rhl rho rhr rhs rkb rke rkk rko rks rle rlh rll rlo rlr rls rob roe roh rok rol roo ror ros rrb rrh rrk rrl rrr rrs rsb rse rsh rsk rsl rso rsr rss sbb sbe sbh sbk sbl sbo sbr sbs se- seb see seh sek sel seo ser ses sh- shb she shh shk shl sho shr shs sk- skb ske skh skk skl sko skr sks slb sle slh slk sll slo slr sls sob soe soh sok sol soo sor sos sr- srb sre srh srk srl sro srr srs ss- ssb sse ssh ssk ssl sso ssr sss