-ous bbbb bbbs bblb bbls bbpr blbt blls blob bloo blop blot blou blsp blss blst blts blub blup blur blus blut bobb bobo bobs bobu boll bolo bols bolt bolu boob bool boop boor boos boot bopp bops bor- boro borr bors bort boru boso boss bost bosu botb boto bots bott boul boup bour bous bout bpot bpsu brlp brls brob brol broo bror bros brot brou brrr brrs brsb brsr brst brup brus brut bsos bspp bspr bsts bsup btbp btlp btob btor btps btrt btss bttb btus bubb bubo bubs bubu bulb bull buls bult bulu buol bups bur- burb burl buro burp burr burs burt buru buss bust busu but- buto buts butt buus lblr lbos lbrs lbrt llbs llll lloo llps lob- lobb lobo lobs loll lolo lols loob lool loop loor loos loot lopp lops lopu loro lors loso losp loss lost lotl loto lotr lots lott loul loup lour lous lout louu lppl lprp lpss lptb lrps lrpu lrrr lrst lrts ls-r lsbu lspl lspr lsso lssp lssr lsts ltbl ltps ltrs ltsp ltsr lttr lubs lull lulu lupo lupu lurs lurt luso luss lust luts luup obbo obls oblu obol obor obos obot obro obsr obss obst obts obus olbo ollo olor olos olot olst oltu olur oolo oooo ooos oops oort oost ootb ootp oots oous opls opo- opor opos oppo opps opsu opto opts opus orbb orbo orbs orbu orlo orlu oro- oror oros orot orps orro orrs orso orsu orto orts orub orup orus osbp oslo osoo osor osos osro ossb osso ossu ostr osts osul otbs oto- otoo otor otos otpp otro otrs otso otsu otto otts ottu otur otus oubs ouls oulu our- ouro ours ourt oust out- outb outo outs ouu- pblu pbrs pbsp plbr plob ploo plop plos plot plou plpp plss pltt plup plur plus pobo pobs poll polo pols polt polu pool poop poor poos poot pop- popo popp pops popt porb poro porr pors port posb poso poss post poto pots pott potu poul poup pour pous pout pplo ppos pppo pppp ppps ppru ppss ppts pptt ppur prbs prlr prls pro- prob prol proo prop pros prot prou prps prrs prsl prso prss prtp prtr prus prut pruu psbr psbt psol psos psou pspp pspr psps psrp psso psst psts pstu ptbl ptol ptop publ pubs pubu pull pulo pulp puls pult pulu pupl pups pupu pur- purb purl puro purp purr purs puru puss pust put- puto puts putt putu rbbb rbbr rbbs rbsl rbsp rbss rbst rlls rob- robb robo robs robt robu roll rolo rolp rolt roob rool roop roor roos root ropo rops roro rort roru roso rosp ross rost rotl roto rotr rots rott roub roul roup rous rout rpls rpob rpos rpps rpts rrrr rrsp rslp rsos rspb rspo rsps rssl rstp rsts rstu rtls rtlt rtps rtss rttp rtts rubb rubp rubs rubu rull rulo rupp rupt ruro rurp rurs ruru ruso russ rust rusu rutl ruto ruts rutt rutu s-os sbbs sbor sbot sbsp sbst sbus slbp sllp slob sloo slop slos slot slpp slps slrp slrs slst slsu slts slub slup slur slut sobo sobp sobr sobs sobt sobu soll solo solp solr sols solt sool soop soor soos soot sopo sopp sops sopu sorb soro sorr sors sort soru soso soss sost sotl soto sotp sots sotu soul soup sour sous sout splo splp splr spls spoo spop spor spos spot spps spro sprs spso spsp spss spst sptb spto sptr spts spur spus sput sros srps srpt srsp srtp srtr srub ssbr sslp sslt ssop ssot sspl sspo ssps sspt ssrl ssrs sssb ssss sstb sstl sstp ssts stbs stlo stlt stob stol stoo stop stor stos stot stou stpp stps stro strs stru stss sttr stub stul stup stur stus stut sub- subb subl subo subs sul- sull sulo sulp sult sulu suor suos sup- supo supp supr sups supt sur- suro surp surr surs surt suru sus- suso susp suss sust susu suto sutu suus tbbs tbrb tbsp tbst tbtp tlos tlrs tobo tobs tobt tobu tol- toll tolo tolt tolu tool toor toos toot top- topo topp tops topt topu toro torp torr tors tort toru tosb toso toss tost tosu toto totr tots tott toul toup tour tous tout tpls tpol tppp tppr tprs tptp tptr tput troo trop tros trot trou trpp trps trst trtr trub trus trut truu tsob tsol tsop tsos tsou tspo tsps tspt tssr tsst tsts tsup ttbb ttop ttss tttt ttul tubb tubo tubr tubs tubu tull tulo tulp tulu tuor tuos tupo tups tupu turb turo turp turr turs turt turu tuss tust tutl tuto tuts tutt tutu tuuo u-rp ubbo ublo ubls ubos ullo ullr ulo- ulos ulto ults ultt ulul ulus uor- uplb uplo upor upos uppp uppu uptl upto upup urbs urls uro- urol uroo urpo urso urss ursu urts urup urur urus urut usbl usbr usbs uslp uslu usos uspo uspp usps ussb ussr usss usst ussu ustb usto ustp usts usul usus utor utsl utto uttu uulu uuuu