-ous bbbb bbbs bblb bbls bbpr blls blob bloo blop blou blsp blss blub blup blur blus bobb bobo bobs bobu boll bolo bols bolu boob bool boop boor boos bopp bops bor- boro borr bors boru boso boss bosu boul boup bour bous bpsu brlp brls brob brol broo bror bros brou brrr brrs brsb brsr brup brus bsos bspp bspr bsup bubb bubo bubs bubu bulb bull buls bulu buol bups bur- burb burl buro burp burr burs buru buss busu buus lblr lbos lbrs llbs llll lloo llps lob- lobb lobo lobs loll lolo lols loob lool loop loor loos lopp lops lopu loro lors loso losp loss loul loup lour lous louu lppl lprp lpss lrps lrpu lrrr ls-r lsbu lspl lspr lsso lssp lssr lubs lull lulu lupo lupu lurs luso luss luup obbo obls oblu obol obor obos obro obsr obss obus olbo ollo olor olos olur oolo oooo ooos oops oous opls opo- opor opos oppo opps opsu opus orbb orbo orbs orbu orlo orlu oro- oror oros orps orro orrs orso orsu orub orup orus osbp oslo osoo osor osos osro ossb osso ossu osul oubs ouls oulu our- ouro ours ouu- pblu pbrs pbsp plbr plob ploo plop plos plou plpp plss plup plur plus pobo pobs poll polo pols polu pool poop poor poos pop- popo popp pops porb poro porr pors posb poso poss poul poup pour pous pplo ppos pppo pppp ppps ppru ppss ppur prbs prlr prls pro- prob prol proo prop pros prou prps prrs prsl prso prss prus pruu psbr psol psos psou pspp pspr psps psrp psso publ pubs pubu pull pulo pulp puls pulu pupl pups pupu pur- purb purl puro purp purr purs puru puss rbbb rbbr rbbs rbsl rbsp rbss rlls rob- robb robo robs robu roll rolo rolp roob rool roop roor roos ropo rops roro roru roso rosp ross roub roul roup rous rpls rpob rpos rpps rrrr rrsp rslp rsos rspb rspo rsps rssl rubb rubp rubs rubu rull rulo rupp ruro rurp rurs ruru ruso russ rusu s-os sbbs sbor sbsp sbus slbp sllp slob sloo slop slos slpp slps slrp slrs slsu slub slup slur sobo sobp sobr sobs sobu soll solo solp solr sols sool soop soor soos sopo sopp sops sopu sorb soro sorr sors soru soso soss soul soup sour sous splo splp splr spls spoo spop spor spos spps spro sprs spso spsp spss spur spus sros srps srsp srub ssbr sslp ssop sspl sspo ssps ssrl ssrs sssb ssss sub- subb subl subo subs sul- sull sulo sulp sulu suor suos sup- supo supp supr sups sur- suro surp surr surs suru sus- suso susp suss susu suus u-rp ubbo ublo ubls ubos ullo ullr ulo- ulos ulul ulus uor- uplb uplo upor upos uppp uppu upup urbs urls uro- urol uroo urpo urso urss ursu urup urur urus usbl usbr usbs uslp uslu usos uspo uspp usps ussb ussr usss ussu usul usus uulu uuuu