bbbb bbbs bbeb bbet bebb bebe beeb beep bees beet bes- bese bess best bete bets bett betu bpsu bseb bsee bses bset bspp bsse bsts bsup btbp btps btss bttb btus bubb bube bubs bubu bueu bups buse buss bust busu but- bute buts butt buus ebbs ebes ebus eeee eees eeps eese eete eets eetu epee epes eppp epps epsp epss epte epub epus esbs esee eses eset espe espp esps esse essp esst essu este estp ests esus etee etes etsu ette ettu euse pbsp peep pees peet pepe peps pese pess pest pesu pete pets pett peut pppp ppps ppss ppts pptt psbt pseb pspp psps psse psst psts pstu pu-e pube pubs pubu puet pueu pupe pups pupu puss pust put- pute puts putt putu sbbs sbse sbsp sbst sbus se-e se-s se-t se-u sebe sebs sebt seeb seep sees seet seeu sepe sepp seps sept sepu sese sess sest set- sete sets sett speb spee spes spet spps spse spsp spss spst sptb spts spue spus sput ssee ssep sses sset sspe ssps sspt sssb ssss sstb sstp ssts stbs stee step stes stet stpp stps stss stub stue stup stus stut sub- subb subs suee sues suet sueu sup- supe supp sups supt sus- suse susp suss sust susu sute sutu suus tbbs tbsp tbst tbtp tebu tees teet tepe tepp tepu tese tesp tess test tete tets tett tetu teut tppp tpte tptp tput tses tset tsps tspt tsse tsst tsts tsup ttbb ttss tttt tubb tube tubs tubu tues tuet tupe tups tupu tuss tust tute tuts tutt tutu ubbe ubet uess upbe uppe uppp uppu upse upup usbe usbs usee uses uset uspp usps ussb usse usss usst ussu ustb uste ustp usts usus utep utes uttu uuuu