-ose bbbb bbbs bbeb bebb bebe bebo beeb beef beek beer bees befe beff befo beke beko beks beo- beof beok beor beos bere berk bero berr bers bes- bese besk beso bess bffs bfsr bobb bobe bobo bobs boee boef boeo boer boes bofe boff bofs boke boko boks boob booe boof book boor boos bor- bore borf bork boro borr bors bose bosk boso boss breb bree bref brek breo brer bres brkb brob broe brok broo bror bros brrr brrs brsb brsr bseb bsee bser bses bsff bsfs bsos bsse ebbo ebbr ebbs eber ebes eboe eboo ebor ebos ebro eeee eees eefe eeke eeks eero eers eese eesk efbr efeo efes effs efke efor ekeb ekek eker ekes ekos eoes eore erbb erbe ereb erer eres erfs erke erks erob eroe eroo eros erre erro errs erse erso esbo esbs esee esek eseo eser eses esfs eske esko esks eso- esok esos esse esso f--k fbrs febo febs feeb feek feer fees fefe feff fefo feke feko feof ferb fere ferk fero ferr fers fese fess ffee ffff ffrr ffss fobs foer foes fofo foke foof fook foos for- forb fore fork foro forr fors fosb foso foss free freo fres frob froe fros frsb frso fsfo fssf k-os kbbb kbbe kbbf kbbk kbbo kbbr kbbs kbeb kbee kbef kbek kbeo kber kbes kbfb kbff kbfk kbfo kbfr kbfs kbkb kbkf kbkk kbko kbkr kbob kboe kbok kboo kbos kbrb kbre kbrf kbrk kbro kbsb kbsk kbso kbsr kbss kebb kebe kebr keef keek keer kees kefb keff kefr kefs kekb keke keko keks keok keos ker- kerb kere kerf kerk kero kerr kers kesb kesk keso kesr kess kfbk kfeb kfer kffb kfff kffk kfkb kfok kfoo kfor kfre kfro kfrr kfrs kfse kfsk kfsr kkbb kkbe kkbo kkbr kkbs kkfr kkfs kkkk kkob kkoo kkor kkrb kkre kkrf kkrk kkro kkrr kkrs kkse kksf kksr kkss kobb kobe kobk kobo kobr kobs koes kofe koff kofk kofo kokb koke kokf kokk koko kokr koks koob kook kooo koor koos korb kore korf kork koro korr kors kos- kosb kose kosf koso kosr koss krbb krbe krbk krbr kreb kree kref krek kreo kres krfe krff krfo krfs krke krkk krko krkr krks krob kroe krof krok kroo kror kros krrb krre krrf krrk krro krrr krrs krse krsf krsk krsr krss ksbr ksbs ksee ksek kseo kser ksfb ksfe ksfo ksfr kskb kske kskf kskk ksko kskr ksks ksob ksof ksok ksoo ksor ksos ksrb ksrf ksro ksrr ksrs ksse ksso kssr ksss o-eo obbo ober obes obkb oboe obok obor obos obre obro obsr obss oere oers oese ofek ofer off- offe offo offr offs ofor ofre oker okes okko okok okor okre okro okso oobe ooer ooes ooff oofs oooo ooos oore oose orbb orbe orbo orbs ore- oreb orek oreo orer ores orfe orff orfs orke orko oro- oroe orof 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 reef reek rees refe reff refr refs reke reko reks reof reos rere rero rers rese reso ress rfef rkkf rkos rkss rob- robb robe robo robs roer roes rofe roff rofo roke rokk roko rokr roks roob roof rook roor roos rore rork roro rose roso ross rrrr rsee rsos rsre s-os sbbs sbef sber sbor sbrk sbse se-e se-f se-k se-o se-s sebe sebo sebs seeb seef seek seer sees seff seke sekk seko seok serb sere serf serk sero serr sers sese seso sess sfer sfor sfos sfro sfss skee skeo sker skes skoe skor skss sobe sobo sobr sobs soeo soes sofo soke sokk soko soof sook soor soos sorb sore soro sorr sors sose soso soss sreb sreo sres sros ssbr ssee sses ssrs sssb sssf ssss