bbbb bbbs bbdd bbrg bd-r bdsd bggs bgst brds brdt brrr brrs brsb brsr brst brud brug brus brut bsbd bsgs bsrd bssd bsts btdt btrt btss bttb btus bubb bubs bubu budb budd budg buds budu bugg bugs bur- burb burd burg burr burs burt buru buss bust busu but- buts butt buus dbrs dbss dbtt dbus dddd ddss ddts ddub dgsb drgs drrs drub drug drus drut druu dsdr dsrr dsst dsts dtss dub- dubb dubs dubu dudd duds dudu dugs dugu durg durt duru dust duts duur duut gbbs gddb gdrt ggbt gggg ggss grbr grds grrr grrs grss grub grug grur grus grut gsds gstr gsur gtbr gubb gubs gubu gudu gugb gugg gugu gurb gurd gurg gurr gurs gurt guru gusb gusd guss gust guts gutt gutu guus rbbb rbbr rbbs rbds rbsd rbss rbst rdgs rgds rgtr rgts rrrr rsdd rsdg rsds rsgb rsts rstu rtdt rtgs rtss rtts rubb rubs rubu rudd ruds rugg rugs rurd rurs ruru russ rust rusu ruts rutt rutu ruud sbbs sbds sbsd sbst sbus sdds sdgs sdrs sdss sdsu sggg sggs sgsd sgss sgts srgb srsd srtr srub ssbr ssdd ssgs ssgt ssrg ssrs sssb ssss sstb sstd ssts stbd stbs stds stgr strd strs stru stss sttd sttr stub stud stug stur stus stut sub- subb subd subg subs sudd suds sug- sugg sur- surd surg surr surs surt suru sus- susd suss sust susu sutu suus tbbs tbgs tbrb tbst tddb tdss tgts trsd trst trtr trub trud trug trus trut truu tsbd tsdb tsgt tssg tssr tsst tsts ttbb ttss tttt tubb tubr tubs tubu tudu tugg tugs tugu turb turd turg turr turs turt turu tusd tuss tust tuts tutt tutu ubud udds udgb udsd udts uggs uggt ugur uguu urbs urds urdu urgu urss ursu urts urur urus urut usbr usbs usds usdt ussb ussr usss usst ussu ustb usts usus uttu utug uuuu