-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 bobb bobe bobo bobs boee boeo boer boes boke boko boks boob booe book boor boos bor- bore bork boro borr bors bose bosk boso boss breb bree brek breo brer bres brkb brob broe brok broo bror bros brrr brrs brsb brsr bseb bsee bser bses bsos bsse ebbo ebbr ebbs eber ebes eboe eboo ebor ebos ebro eeee eees eeke eeks eero eers eese eesk ekeb ekek eker ekes ekos eoes eore erbb erbe ereb erer eres erke erks erob eroe eroo eros erre erro errs erse erso esbo esbs esee esek eseo eser eses eske esko esks eso- esok esos esse esso k-os kbbb kbbe kbbk kbbo kbbr kbbs kbeb kbee kbek kbeo kber kbes kbkb kbkk kbko kbkr kbob kboe kbok kboo kbos kbrb kbre kbrk kbro kbsb kbsk kbso kbsr kbss kebb kebe kebr keek keer kees kekb keke keko keks keok keos ker- kerb kere kerk kero kerr kers kesb kesk keso kesr kess kkbb kkbe kkbo kkbr kkbs kkkk kkob kkoo kkor kkrb kkre kkrk kkro kkrr kkrs kkse kksr kkss kobb kobe kobk kobo kobr kobs koes kokb koke kokk koko kokr koks koob kook kooo koor koos korb kore kork koro korr kors kos- kosb kose koso kosr koss krbb krbe krbk krbr kreb kree krek kreo kres krke krkk krko krkr krks krob kroe krok kroo kror kros krrb krre krrk krro krrr krrs krse krsk krsr krss ksbr ksbs ksee ksek kseo kser kskb kske kskk ksko kskr ksks ksob ksok ksoo ksor ksos ksrb ksro ksrr ksrs ksse ksso kssr ksss o-eo obbo ober obes obkb oboe obok obor obos obre obro obsr obss oere oers oese oker okes okko okok okor okre okro okso oobe ooer ooes oooo ooos oore oose orbb orbe orbo orbs ore- oreb orek oreo orer ores orke orko oro- oroe orok oror oros orro orrs orse orsk orso osbe osee osek oser oses osoo osor osos osro ossb osse osso rbbb rbbr rbbs rbss rebb rebe rebk rebo rebs reeb reek rees reke reko reks reos rere rero rers rese reso ress rkos rkss rob- robb robe robo robs roer roes roke rokk roko rokr roks roob rook roor roos rore rork roro rose roso ross rrrr rsee rsos rsre s-os sbbs sber sbor sbrk sbse se-e se-k se-o se-s sebe sebo sebs seeb seek seer sees seke sekk seko seok serb sere serk sero serr sers sese seso sess skee skeo sker skes skoe skor skss sobe sobo sobr sobs soeo soes soke sokk soko sook soor soos sorb sore soro sorr sors sose soso soss sreb sreo sres sros ssbr ssee sses ssrs sssb ssss