-er bbb bbe bbi bbk bbo bbr bbs be- beb bee bei bek beo ber bes bi- bib bie bii bik bio bir bis bkb bke bkk bko bkr bks bob boe boi bok boo bor bos brb bre bri brk bro brr brs bsb bse bsi bsk bso bsr bss ebb ebe ebi ebk ebo ebr ebs eeb eee eek eeo eer ees eib eie eii eik eio eir eis ekb eke eki eko ekr eks eo- eob eoe eoi eok eoo eor eos erb ere eri erk ero err ers es- esb ese esi esk eso esr ess ibb ibe ibi ibk ibo ibr ibs ie- iee iei iek ier ies iib iie iii iio iir iis ikb ike iki ikk iko ikr iks io- iob ioe ioi ioo ior ios ir- irb ire iri irk iro irr irs is- isb ise isi isk iso isr iss kbb kbe kbi kbk kbo kbr kbs ke- keb kee kei kek keo ker kes kib kie kii kik kio kir kis kkb kke kki kkk kkr kks kob koe koi kok koo kor kos kri krk kro krr krs ksb kse ksi ksk kso ksr kss o-i ob- obb obe obi obk obo obr obs oeb oee oei oeo oer oes oib oie oii oik oio oir ois okb oke oki okk oko okr oks oo- oob ooi ook ooo oor oos or- orb ore ori ork oro orr ors os- osb ose osi osk oso osr oss rbb rbe rbi rbk rbo rbr rbs re- reb ree rei rek reo rer res rib rie rii rik rio rir ris rkb rke rkk rko rks rob roe roi rok roo ror ros rrb rri rrk rrr rrs rsb rse rsi rsk rso rsr rss sbb sbe sbi sbk sbo sbr sbs se- seb see sei sek seo ser ses sib sie sii sik sio sir sis sk- skb ske ski skk sko skr sks sob soe soi sok soo sor sos sr- srb sre sri srk sro srr srs ss- ssb sse ssi ssk sso ssr sss

-ose bbbb bbbs bbeb bebb bebe bebi bebo beeb beek beer bees beik beir beis beke beki beko beks beo- beok beor beos bere beri berk bero berr bers bes- bese besk beso bess bibb bibe bibi bibo bibs bieb bier bies biis bike biko bio- bioi bios birb bire biri birk biro birr birs bis- bise bisk biso biss bobb bobe bobi bobo bobs boee boeo boer boes boi- boie boii bois boke boki boko boks boob booe book boor boos bor- bore bori bork boro borr bors bose bosi bosk boso boss breb bree brei brek breo brer bres brie brik brio bris brkb brob broe brok broo bror bros brrr brrs brsb brsr bseb bsee bser bses bsos bsse ebbo ebbr ebbs eber ebes ebis eboe eboo ebor ebos ebro eeee eees eeke eeks eero eers eese eesi eesk eiei eier eies eike eiki eiko eiks eire eirs eise eisk eiso eiss ekeb ekek eker ekes ekis ekki ekoi ekos eksi eoes eoir eois eore eori erbb erbe ereb erei erer eres erie erik erio eris erke erki erks erob eroe eroi eroo eros erre erro errs erse ersi erso esbo esbs esee esek eseo eser eses esie esik esis eske esko esks eso- esok esos esri esse essi esso i-be ibes ibie ibis ibos ibri ibro ibss ieie ieio iere ieri iers iesi ieso iesr iies iiie iiii iiio iiis iioi iioo iios iirs iisi iisr ikee iker ikes ikki ikko ikoo ikri iobi ioee ioii ioio ioke ioko iooi iooo ioos iore iori iors ioso irbe iree irer ires iri- irie irio iris irki irks irob irre irri irrs irse isbe iseb isee iseo iser ises isie isis isko iso- isok isor isos isri isse issi isso issr isss k-os kbbb kbbe kbbi kbbk kbbo kbbr kbbs kbeb kbee kbek kbeo kber kbes kbib kbie kbik kbio kbis kbkb kbkk kbko kbkr kbob kboe kboi kbok kboo kbos kbrb kbre kbri kbrk kbro kbsb kbsi kbsk kbso kbsr kbss kebb kebe kebi kebr keek keer kees keib keii keik keio keir keis kekb keke keki keko keks keok keos ker- kerb kere keri kerk kero kerr kers kesb kesi kesk keso kesr kess kibb kibe kibi kibo kibr kibs kier kies kiii kiik kiis kiki kikk kiko kikr kioe kioi kiok kioo kirb kiri kirk kiro kirr kirs kise kisi kisk kiso kisr kiss kkbb kkbe kkbi kkbo kkbr kkbs kkik kkkk kkob kkoo kkor kkrb kkre kkrk kkro kkrr kkrs kkse kksi kksr kkss kobb kobe kobi kobk kobo kobr kobs koei koes koii koir kokb koke koki kokk koko kokr koks koob kooi kook kooo koor koos korb kore kori kork koro korr kors kos- kosb kose kosi koso kosr koss krbb krbe krbi krbk krbr kreb kree krei krek kreo kres krib krik krio kris krke krki krkk krko krkr krks krob kroe kroi krok kroo kror kros krrb krre krri krrk krro krrr krrs krse krsk krsr krss ksbi ksbr ksbs ksee ksei ksek kseo kser ksib ksii ksik ksir ksis kskb kske kskk ksko kskr ksks ksob ksoi ksok ksoo ksor ksos ksrb ksro ksrr ksrs ksse kssi ksso kssr ksss o-eo obbo ober obes obie obis obkb oboe oboi obok obor obos obre obri obro obsr obss oere oers oese oier oies oiii oike oiko oiks oios oire oise oker okes okie okir okko okok okor okre okro oksi okso oobe oobi ooer ooes oooo ooos oore oose oosi orbb orbe orbi orbo orbs ore- oreb orek oreo orer ores ori- orie orio oris orke orko oro- oroe orok oror oros orri orro orrs orse orsi orsk orso osbe osee osei osek oser oses osie osii osik osis oski osoi osoo osor osos osro ossb osse ossi osso rbbb rbbr rbbs rbis rbss rebb rebe rebk rebo rebs reeb reek rees reii reik reir reis reke reki reko reks reos rere reri