-hou bbbb bbrg bght bhog bhor bhot bhrt bhur bhut bhuu bobb bobo bobu bogg bogh bogo bogt boho bohr boht bohu boob boog booh boor boot bor- borg borh boro borr bort boru botb both boto bott bouh bour bout brob brog broh broo bror brot brou brrr brug bruh brut btob btor btrt bttb bubb bubo bubu bugg bugh bugo buho buhr bur- burb burg burh buro burr burt buru but- buto butt gbbo ggbt gggg gghg ghug gobo gogh gogo gohb goog goor goot gorb gorg goro gorr gort goth goto gott gou- goug gour gout grbr grob grog groh groo gror grot grou grrr grub grug grur grut gtbr gubb gubu gugb gugg gugh gugu guhr gurb gurg gurh guro gurr gurt guru guth guto gutt gutu hbtu hhgg hhhh hobo hogg hogh hogo hogu hoho hoor hoot horg horo horr hort hotb hoth hoto hotr hott hotu hour hout hrob hrtb htoh httr hubb hubo hugg hugh hugo huhu huor huot huro hurr hurt huru huth huto hutt hutu huub obbo obor obot obrh obro obuh ogb oght ogog ogou ogro ohgr ohho ohob ohoh ohto ohtu ooho oooh oooo oort ootb orbb orbo orbu orgo oro- oror orot orro orth orto orub otho othr oto- otog otoh otoo otor otro otto ottu otur ough our- ouro ourt out- outb outh outo ouu- rbbb rbbr rbgh rboh rgtr rhbg rhob rhog rhoh rhug rob- robb robo robt robu rogg rogh rogo rohr rohu roob roog roor root roro rort roru rotg roth roto rotr rott roub rouh rout rrrr rubb rubu rugg rugh ruhh ruhr ruro ruru ruth ruto rutt rutu tbrb thog thoo thor thot thou thro thru thtb thtr thug thur tobo tobt tobu togh togo togr togt toho tohu tooh toor toot torg toro torr tort toru toth toto totr tott toug touh tour tout trog troo trot trou trtr trub trug trut truu ttbb tttt tubb tubo tubr tubu tugg tugh tugu tuht tuhu tuor turb turg turo turr turt turu tuto tutt tutu tuuo ubbo uggo uggt ugro ugur uguu uhoh uhuh uor- urgh urgu urho uro- uroo urrh urth urur urut utor utto uttu utug uuuu