-ous bbbb bbbs bblb bbls blls blno blob blon bloo blou blss blub blur blus bnor bnrr bnss bobb bobo bobs bobu boll boln bolo bols bolu bonn bono bons bonu boob bool boon boor boos bor- born boro borr bors boru bosn boso boss bosu boul boun bour bous brls brno brns brob brol bron broo bror bros brou brrr brrs brsb brsr brun brus bsns bson bsos bubb bubo bubs bubu bulb bull buls bulu bunb bunn buno buns bunu buol buon bur- burb burl burn buro burr burs buru buss busu buus lblr lbos lbrs llbs llll lloo lnso lob- lobb lobo lobs loll lolo lols lono lonr lons loob lool loon loor loos lorn loro lors loso loss loul loun lour lous louu lron lrrr ls-r lsbu lson lsso lssr lubs lull lulu lunn luno luns lurs luso luss nbbo nlls nlrb nnls nnnn nnos nnsl nnss nobo nobs nobu noll nolo nols non- nonn nono nons nonu noo- noob nool noon nooo noor noos nor- norb norn noro norr nors nos- noss nosu noul noun nour nous nrlb nron nrrl nsbo nslr nsls nsnr nsos nsou nsrl nssb nsso nssr nsss nsub nubl nubs null nunn nuno nuns nuon nurl nurn nurr nurs nuru nusl nuss nusu obbo obls oblu obol obon obor obos obro obsn obsr obss obus olbo ollo olon olor olos olur onno onon onor onos onso onur onus oolo oons oooo ooos oous orbb orbo orbs orbu orlo orlu orno orns oro- oron oror oros orro orrs orso orsu orub orus oslo osno osnr osoo osor osos osro ossb osso ossu osul osun oubs ouls oulu oun- our- ourn ouro ours ouu- rbbb rbbr rbbs rbsl rbss rlls rnbr rob- robb robo robs robu roll rolo rono rons roob rool roon roor roos roro roru roso ross roub roul roun rous rrrr rrun rsnn rsno rsnr rsos rssl rubb rubs rubu rull rulo runn runo runs ruro rurs ruru ruso russ rusu ruun s-os sbbs sbor sbus slln slob slon sloo slos slrn slrs slsu slub slur snns snob snoo snor snos snrs snub snur snus sobo sobr sobs sobu soll soln solo solr sols son- sono sons sonu sool soon soor soos sorb sorn soro sorr sors soru soso soss soul soun sour sous srnn srno sros srub ssbn ssbr ssns ssrl ssrs sssb ssss sub- subb subl subo subs sul- sull sulo sulu sun- sunb sunn suno suns sunu suor suos sur- surn suro surr surs suru sus- suso suss susu suus ubbo ublo ubls ubon ubos ullo ullr ulno ulo- ulos ulul ulus unno unns unon unos unro unrs uns- unso unus uor- urbs urls urns uro- urol uroo urso urss ursu urun urur urus usbl usbr usbs uslu usno usnr usnu usos ussb ussr usss ussu usul usun usus uulu uuno uuuu