bbbb bbbs bbdd bd-r bdsd bnrr bnss brds brkb brns brrr brrs brsb brsr brud brun brus bsbd bsnd bsns bsrd bssd bubb bubs bubu budb budd buds budu bukk buku bunb bund bunk bunn buns bunu bur- burb burd burk burn burr burs buru busk buss busu buus dbrn dbrs dbss dbus dddd ddss ddub dnuk dnus drrs drub druk drus druu dsdr dsrr dssn dub- dubb dubs dubu dudd duds dudu duku dunk dunn duns durk durn duru dusk duur kbbb kbbd kbbk kbbr kbbs kbbu kbdb kbdn kbdr kbds kbkb kbkk kbkr kbnd kbnn kbnr kbnu kbrb kbrd kbrk kbrn kbru kbsb kbsk kbsn kbsr kbss kbsu kbub kbud kbuk kbun kbur kbus kbuu kdbb kdbn kdbr kdbs kddb kddd kddk kddr kdkb kdkd kdkk kdkn kdkr kdnd kdnk kdnn kdnr kdns kdrb kdrs kdsd kdsk kdsn kdsr kdss kdsu kdub kdun kdur kdus kkbb kkbd kkbn kkbr kkbs kkdd kkkk kknb kknd kknn kkns kknu kkrb kkrk kkrn kkrr kkrs kksd kksn kksr kkss kksu kkus kkuu knbb knbn knbr knbu kndb kndd kndk kndn kndr kndu knkk knnb knnd knnk knnr knns knrb knrk knrs knsb knsd knsk knsn knsr knss knsu knub knud knuk knur knus krbb krbd krbk krbr krdd krdr krds krdu krkd krkk krkn krkr krks krku krnb krnd krnk krnn krnu krrb krrk krrn krrr krrs krsd krsk krsn krsr krss krsu kruk krun krur ksbn ksbr ksbs ksdk ksdn ksdr ksds kskb kskd kskk kskn kskr ksks ksku ksnb ksnd ksnk ksnn ksnr ksns ksrb ksrn ksrr ksrs kssn kssr ksss kssu ksub ksud ksun ksuu kubb kubd kubr kubs kubu kudd kudu kukk kukn kuks kuku kund kunk kunr kuns kunu kurb kurd kurk kurr kurs kuru kusb kusd kusn kusu kuub kuuk kuur kuuu nddb ndss nndb nnnn nnss nrds nrrd nsds nskk nsnr nsrd nssb nssr nsss nsub nubk nubs nudd nuku nunk nunn nuns nurd nurn nurr nurs nuru nuss nusu nuuk rbbb rbbr rbbs rbds rbsd rbss rkss rnbr rnds rrrr rrun rsdd rsds rsnn rsnr rubb rubs rubu rudd ruds rukk rukn ruku rund runk runn runs rurd rurs ruru rusk russ rusu ruud ruun sbbs sbds sbrk sbsd sbus sdds sdrs sdss sdsu skn- sksd skss skud skun skur snns snrk snrs snsd snub snur snus srnn srsd srub ssbn ssbr ssdd ssns ssrs sssb ssss sub- subb subd subs sudd suds suks suku sun- sunb sund sunk sunn suns sunu sur- surd surn surr surs suru sus- susd susk suss susu suus ubud udds udsd uduk udun ukur unbd unds unkn unks unns unrs uns- unus urbs urds urdu urns urss ursu uruk urun urur urus us-k usbr usbs usds usnr usnu ussb ussr usss ussu usun usus uuuu