-er bbb bbe bbk bbo bbr bbs be- beb bee bek beo ber bes bev bez bkb bke bkk bko bkr bks bkv bob boe bok boo bor bos bov boz brb bre brk bro brr brs brv brz bsb bse bsk bso bsr bss bsv bvb bve bvk bvo bvr bvs bvv bze bzo bzr bzs bzz ebb ebe ebk ebo ebr ebs ebv eeb eee eek eeo eer ees eev ekb eke eko ekr eks ekv eo- eob eoe eok eoo eor eos erb ere erk ero err ers erv erz es- esb ese esk eso esr ess esv evb eve evo evr evs evv eze ezo ezr ezs ezz k-z kbb kbe kbk kbo kbr kbs kbz ke- keb kee kek keo ker kes kev kez kkb kke kkk kkr kks kkv kob koe kok koo kor kos koz krk kro krr krs krv ksb kse ksk kso ksr kss ksv kvb kvk kvo kvr kvs kvv kzo ob- obb obe obk obo obr obs obv oeb oee oeo oer oes okb oke okk oko okr oks oo- oob ook ooo oor oos oov or- orb ore ork oro orr ors orv orz os- osb ose osk oso osr oss osv ov- ovb ove ovo ovs ovv oze ozo ozs ozz rbb rbe rbk rbo rbr rbs re- reb ree rek reo rer res rev rez rkb rke rkk rko rks rkv rkz rob roe rok roo ror ros rov roz rrb rrk rrr rrs rsb rse rsk rso rsr rss rsv rvb rve rvo rvr rvs rvv rzb rze rzo sbb sbe sbk sbo sbr sbs sbv se- seb see sek seo ser ses sev sez sk- skb ske skk sko skr sks sob soe sok soo sor sos sov soz sr- srb sre srk sro srr srs srv ss- ssb sse ssk sso ssr sss ssv ssz svb sve svk svo svr svs svv svz sze szr v-e vbk vbo vbr vbs vbv vbz veb vee vek veo ver ves vez vkb vob voe vok voo vor vos vov voz vrb vre vrk vrr vrs vsb vse vsk vso vsr vss vsv vvb vvo vvr vvs vvv vvz zbb zbr zbs zbv zeb zee zek zeo zer zes zev zez zks zo- zob zoe zok zoo zor zos zro zrs zse zsz zzr zzs zzz

-ose bbbb bbbs bbeb bebb bebe bebo beeb beek beer bees beke beko beks beo- beok beor beos bere berk bero berr bers bes- bese besk beso bess bevo bevs bevz beze bobb bobe bobo bobs boee boeo boer boes boke boko boks boob booe book boor boos booz bor- bore bork boro borr bors borz bose bosk boso boss bove bovo bozo breb bree brek breo brer bres brev brez brkb brob broe brok broo bror bros broz brrr brrs brsb brsr bseb bsee bser bses bsos bsse bzer bzoe bzrk bzzz ebbo ebbr ebbs eber ebes eboe eboo ebor ebos ebro eeee eees eeke eeks eero eers eese eesk eeze ekeb ekek eker ekes ekos eoes eore erbb erbe ereb erer eres erev erez erke erks erob eroe eroo eros erre erro errs erse erso erve esbo esbs esee esek eseo eser eses eske esko esks eso- esok esos esse esso ever eves evoe evoo evos evre evrs evvk ezek ezer ezov ezzo k-os kbbb kbbe kbbk kbbo kbbr kbbs kbbz kbeb kbee kbek kbeo kber kbes kbev kbez kbkb kbkk kbko kbkr kbkv kbkz kbob kboe kbok kboo kbos kbov kboz kbrb kbre kbrk kbro kbrv kbrz kbsb kbsk kbso kbsr kbss kbsv kbsz kbvb kbvo kbvr kbze kbzo kbzs kbzz kebb kebe kebr keek keer kees kekb keke keko keks keok keos ker- kerb kere kerk kero kerr kers kerv kerz kesb kesk keso kesr kess kesz keve kevs kezb keze kezr kezz kkbb kkbe kkbo kkbr kkbs kkbz kkez kkkk kkob kkoo kkor kkov kkoz kkrb kkre kkrk kkro kkrr kkrs kkrv kkrz kkse kksr kkss kkvr kkvv kkzz kobb kobe kobk kobo kobr kobs koes kokb koke kokk koko kokr koks kokz koob kook kooo koor koos koov kooz korb kore kork koro korr kors korv kos- kosb kose koso kosr koss kosz kove kovk kovo kovr kozb koze kozk kozo kozr krbb krbe krbk krbr krbz kreb kree krek kreo kres krev krez krke krkk krko krkr krks krkv krkz krob kroe krok kroo kror kros krov kroz krrb krre krrk krro krrr krrs krrz krse krsk krsr krss krsv krvb krve krvk krvo krvr krvs krvv krvz krze krzk krzr krzs krzz ksbr ksbs ksbv ksbz ksee ksek kseo kser ksev ksez kskb kske kskk ksko kskr ksks kskz ksob ksok ksoo ksor ksos ksrb ksro ksrr ksrs ksrv ksrz ksse ksso kssr ksss kssz ksve ksvr kszr kvbr kvbz kver kves kvob kvoe kvok kvoo kvor kvov kvoz kvre kvro kvrr kvrv kvso kvsr kvss kvsv kvvr kvvs kvvv kvvz kzbb kzbe kzbk kzbr kzbs kzbv kzbz kzee kzer kzke kzkr kzks kzkz kzoo kzor kzoz kzrb kzrk kzro kzrr kzrs kzrv kzrz kzsb kzse kzzb kzzk kzzo kzzr kzzs kzzv kzzz o-eo obbo ober obes obkb oboe obok obor obos obre obro obsr obss obvs oere oers oese oker okes okko okok okor okre okro okso oobe ooer ooes oooo ooos oore oose ooze orbb orbe orbo orbs ore- oreb orek oreo orer ores orke orko oro- oroe orok oror oros oroz orro orrs orse orsk orso orve orvr orvs orzk orzo osbe osee osek oser oses osez osoo osor osos osov osro ossb osse osso osve ovee over ovo- ovoo ovre ozee ozek ozer rbbb rbbr rbbs rbss rebb rebe rebk rebo rebs reeb reek rees reev reke reko reks reos rere rero rers rese reso ress reve revo revs reze rkos rkss rksv rob- robb robe robo robs roer roes roev roke rokk roko rokr roks roob rook roor roos rooz rore rork roro rose roso ross rove rovo rovs roze rozz rrrr rsee rsos rsre rver s-os