-ous bbbb bbbs bblb bbls blbt blls blob bloo blop blot blou blsp blss blst blts blub blup blus blut bobb bobo bobs bobu boll bolo bols bolt bolu boob bool boop boos boot bopp bops boso boss bost bosu botb boto bots bott boul boup bous bout bpot bpsu bsos bspp bsts bsup btbp btlp btob btps btss bttb btus bubb bubo bubs bubu bulb bull buls bult bulu buol bups buss bust busu but- buto buts butt buus lbos llbs llll lloo llps lob- lobb lobo lobs loll lolo lols loob lool loop loos loot lopp lops lopu loso losp loss lost lotl loto lots lott loul loup lous lout louu lppl lpss lptb lsbu lspl lsso lssp lsts ltbl ltps ltsp lubs lull lulu lupo lupu luso luss lust luts luup obbo obls oblu obol obos obot obss obst obts obus olbo ollo olos olot olst oltu oolo oooo ooos oops oost ootb ootp oots oous opls opo- opos oppo opps opsu opto opts opus osbp oslo osoo osos ossb osso ossu osts osul otbs oto- otoo otos otpp otso otsu otto otts ottu otus oubs ouls oulu oust out- outb outo outs ouu- pblu pbsp plob ploo plop plos plot plou plpp plss pltt plup plus pobo pobs poll polo pols polt polu pool poop poos poot pop- popo popp pops popt posb poso poss post poto pots pott potu poul poup pous pout pplo ppos pppo pppp ppps ppss ppts pptt psbt psol psos psou pspp psps psso psst psts pstu ptbl ptol ptop publ pubs pubu pull pulo pulp puls pult pulu pupl pups pupu puss pust put- puto puts putt putu s-os sbbs sbot sbsp sbst sbus slbp sllp slob sloo slop slos slot slpp slps slst slsu slts slub slup slut sobo sobp sobs sobt sobu soll solo solp sols solt sool soop soos soot sopo sopp sops sopu soso soss sost sotl soto sotp sots sotu soul soup sous sout splo splp spls spoo spop spos spot spps spso spsp spss spst sptb spto spts spus sput sslp sslt ssop ssot sspl sspo ssps sspt sssb ssss sstb sstl sstp ssts stbs stlo stlt stob stol stoo stop stos stot stou stpp stps stss stub stul stup stus stut sub- subb subl subo subs sul- sull sulo sulp sult sulu suos sup- supo supp sups supt sus- suso susp suss sust susu suto sutu suus tbbs tbsp tbst tbtp tlos tobo tobs tobt tobu tol- toll tolo tolt tolu tool toos toot top- topo topp tops topt topu tosb toso toss tost tosu toto tots tott toul toup tous tout tpls tpol tppp tptp tput tsob tsol tsop tsos tsou tspo tsps tspt tsst tsts tsup ttbb ttop ttss tttt ttul tubb tubo tubs tubu tull tulo tulp tulu tuos tupo tups tupu tuss tust tutl tuto tuts tutt tutu tuuo ubbo ublo ubls ubos ullo ulo- ulos ulto ults ultt ulul ulus uplb uplo upos uppp uppu uptl upto upup usbl usbs uslp uslu usos uspo uspp usps ussb usss usst ussu ustb usto ustp usts usul usus utsl utto uttu uulu uuuu