bbbb bbdd bbdo bbrg bd-r bdog bobb bobo bobu bodb bodo bodu bogd bogg bogo bogt boob bood boog boor boot bor- bord borg boro borr bort boru botb botd boto bott boud bour bout brdo brdt brob brod brog broo bror brot brou brrr brud brug brut btdt btob btor btrt bttb bubb bubo bubu budb budd budg budo budu bugg bugo bur- burb burd burg buro burr burt buru but- buto butt d-bo dbtt dddd ddot ddub dobb dobu dod- dodd dodg dodo dog- dogg dogo dogu doob dood door doot dord doro dorr dort doru dotd doto dott doub doud doug dour dout drob drod drog drot drou drub drug drut druu dtor dtot dub- dubb dubu dudd dudo dudu dugu duo- durg duro durt duru duur duut gbbo gddb gdor gdrt ggbt gggg gobo godo gogo good goog goor goot gorb gord gorg goro gorr gort gotd goto gott gou- goud goug gour gout grbr grob grod grog groo gror grot grou grrr grub grug grur grut gtbr gubb gubu gudo gudu gugb gugg gugu gurb gurd gurg guro gurr gurt guru guto gutt gutu obbo obdt obor obot obro obtd odbo oddd odoo odor odot odou odtu odur ogb ogod ogog ogou ogro oooo oord oort ootb orbb orbo orbu ordo ordu orgo oro- oror orot orro orto orub otbd oto- otog otoo otor otro otto ottu otur our- ouro ourt out- outb outo ouu- rbbb rbbr rgtr rob- robb robo robt robu rodd rodo rogg rogo roob rood roog roor root roro rort roru rotg roto rotr rott roub roud rout rrrr rtdt rubb rubu rudd rudo rugg rurd ruro ruru ruto rutt rutu ruud tbrb tddb tdor tobo tobt tobu todd todo todt todu togo togr togt tood toor toot tord torg toro torr tort toru totd toto totr tott toug tour tout trod trog troo trot trou trtr trub trud trug trut truu ttbb tttt tubb tubo tubr tubu tudu tugg tugu tuor turb turd turg turo turr turt turu tuto tutt tutu tuuo ubbo ubod ubud udgb udoo udot uggo uggt ugod ugro ugur uguu uor- urdu urgu uro- uroo urur urut utor utto uttu utug uuuu