-ous bbbb bbbs bbrg bggs bgst bobb bobo bobs bobu bogg bogo bogs bogt boob boog boor boos boot bor- borg boro borr bors bort boru boso boss bost bosu botb boto bots bott bour bous bout brob brog broo bror bros brot brou brrr brrs brsb brsr brst brug brus brut bsgs bsos bsts btob btor btrt btss bttb btus bubb bubo bubs bubu bugg bugo bugs bur- burb burg buro burr burs burt buru buss bust busu but- buto buts butt buus gbbo gbbs ggbt gggg ggss gobo gobs gogo gogs goog goor goos goot gorb gorg goro gorr gors gort goso goss gost gosu goto gots gott gou- goug gour gous gout grbr grob grog groo gror gros grot grou grrr grrs grss grub grug grur grus grut gsos gstr gsur gtbr gtos gubb gubs gubu gugb gugg gugu guos gurb gurg guro gurr gurs gurt guru gusb guss gust guto guts gutt gutu guus obbo obor obos obot obro obsr obss obst obts obus ogb ogog ogou ogro ogus oooo ooos oort oost ootb oots oous orbb orbo orbs orbu orgo orgs oro- oror oros orot orro orrs orso orsu orto orts orub orus osoo osor osos osro ossb osso ossu ostr osts otbs oto- otog otoo otor otos otro otrs otsg otso otsu otto otts ottu otur otus oubs our- ouro ours ourt oust out- outb outo outs ouu- rbbb rbbr rbbs rbss rbst rgtr rgts rob- robb robo robs robt robu rogg rogo roob roog roor roos root roro rort roru roso ross rost rotg roto rotr rots rott roub rous rout rrrr rsgb rsos rsts rstu rtgs rtss rtts rubb rubs rubu rugg rugs ruro rurs ruru ruso russ rust rusu ruto ruts rutt rutu s-os sbbs sbor sbot sbst sbus sggg sggs sgro sgss sgts sobo sobr sobs sobt sobu sogo sogs soog soor soos soot sorb sorg soro sorr sors sort soru soso soss sost soto sots sotu sour sous sout srgb sros srtr srub ssbr ssgs ssgt ssot ssrg ssrs sssb ssss sstb ssts stbs stgr stob stog stoo stor stos stot stou stro strs stru stss sttr stub stug stur stus stut sub- subb subg subo subs sug- sugg sugo suor suos sur- surg suro surr surs surt suru sus- suso suss sust susu suto sutu suus tbbs tbgs tbrb tbst tgts tobo tobs tobt tobu togo togr togs togt toor toos toot torg toro torr tors tort toru tosb toso toss tost tosu toto totr tots tott toug tour tous tout trog troo tros trot trou trst trtr trub trug trus trut truu tsgt tsob tsos tsou tssg tssr tsst tsts ttbb ttss tttt tubb tubo tubr tubs tubu tugg tugs tugu tuor tuos turb turg turo turr turs turt turu tuss tust tuto tuts tutt tutu tuuo ubbo ubos uggo uggs uggt ugos ugro ugur uguu uor- urbs urgu uro- uroo urso urss ursu urts urur urus urut usbr usbs usgo usog usos ussb ussr usss usst ussu ustb usto usts usus utor utto uttu utug uuuu