-ous bbbb bbbs bbdd bbdo bdos bdsd bobb bobo bobs bobu bodb bodo bods bodu boko boks boku boob bood book boos boot bosk boso boss bost bosu botb botd boto bots bott boud bouk bous bout bsbd bskt bsod bsos bssd bsts btdt btob btss bttb btus bubb bubo bubs bubu budb budd budo buds budu bukk buko buku busk buss bust busu but- buto buts butt buus d-bo dbos dbss dbtt dbus dddd ddot ddss ddts ddub dobb dobs dobu dod- dodd dodo dods doko doob dood dook doos doot dosk doso doss dost dotd dotk doto dots dott doub doud douk dous dout dsos dsst dsto dsts dtot dtss dub- dubb dubs dubu dudd dudo duds dudu dukt duku duo- duos dusk dust duts duut k-os kbbb kbbd kbbk kbbo kbbs kbbt kbbu kbdb kbdo kbds kbkb kbkk kbko kbob kbod kbok kboo kbos kbot kbsb kbsk kbso kbss kbst kbsu kbtb kbtk kbto kbts kbtt kbub kbud kbuk kbus kbut kbuu kdbb kdbs kddb kddd kddk kdkb kdkd kdkk kdko kdkt kdok kdot kdsd kdsk kdss kdst kdsu kdtd kdub kdus kdut kkbb kkbd kkbo kkbs kkbt kkdd kkdo kkdt kkkk kkob kkoo kkot kksd kkss kkst kksu kktk kkts kktu kkus kkut kkuu kobb kobk kobo kobs kobu kodk kodo kods kodt kodu kokb kokk koko koks koku koob kook kooo koos koot koou kos- kosb kosd koso koss kost kosu kotb kotd kotk koto kots kott kotu koub kous kout kouu ksbs ksdk ksds kskb kskd kskk ksko ksks ksku ksob ksok ksoo ksos ksou ksso ksss ksst kssu kstb kstk ksto ksts kstt kstu ksub ksud ksut ksuu ktbb ktbt ktbu ktdb ktdd ktdk ktdo ktkb ktkk ktko ktks ktkt ktku ktob ktok ktoo ktot ktsd ktso ktst ktsu kttk ktto ktts kttt kttu ktub kubb kubd kubo kubs kubu kudd kudo kudu kukk kuks kuku kuok kuoo kuos kusb kusd kuso kust kusu kuto kuts kutt kutu kuub kuuk kuuu obbo obdt obkb obok obos obot obsd obss obst obtd obts obus odbo oddd odds odoo odos odot odou odso odts odtu odus okko okok okot okso okto okus ooku oooo ooos oost ootb oots oous osku osoo osos ossb ossd osso ossu osts otbd otbs oto- otok otoo otos otso otsu otto otts ottu otus oubs ouds ousd oust out- outb outo outs ouu- s-os sbbs sbds sbot sbsd sbst sbtk sbus sdds sdot sdss sdsu skot sksd skss skud skut sobo sobs sobt sobu sodd sodo sods sodu sokk soko soku sood sook soos soot soso soss sost sotk soto sots sotu soud souk sous sout ssdd ssot sssb ssss sstb sstd ssts stbd stbs stds stks stob stod stok stoo stos stot stou stss sttd stub stud stuk stus stut sub- subb subd subo subs sudd sudo suds suks suku suos sus- susd susk suso suss sust susu suto sutu suus tbbs tbst tddb tdss tkod tkos tkts tobo tobs tobt tobu todd todo tods todt todu toko toku tood took toos toot tosb tosk toso toss tost tosu totd toto tots tott touk tous tout tsbd tsdb tsks tsob tsos tsou tsst tsts ttbb ttss tttt tubb tubo tubs tubu tudu tuko tuks tuos tusd tusk tuss tust tuto tuts tutt tutu tuuo ubbo ubod ubos ubud udds udoo udos udot udsd udts uduk ukko ukok us-k usbs usdo usds usdt usos ussb usss usst ussu ustb usto usts usus utto uttu uuuu