-hou bbbb bbrg bght bhog bhor bhot bhrt bhur bhut bhuu bobb bobo bobu bogg bogh bogo bogt boho bohr boht bohu boko boku boob boog booh book boor boot bor- borg borh bork boro borr bort boru botb both boto bott bouh bouk bour bout brkb brob brog broh brok broo bror brot brou brrr brug bruh brut btob btor btrt bttb bubb bubo bubu bugg bugh bugo buho buhr bukh bukk buko buku bur- burb burg burh burk buro burr burt buru but- buto butt gbbo ggbt gggg gghg ghug gobo gogh gogo gohb goku goog gook goor goot gorb gorg goro gorr gort goth goto gott gou- goug gouk gour gout grbr grob grog groh grok groo gror grot grou grrr grub grug grur grut gtbr gubb gubu gugb gugg gugh gugu guhr gurb gurg gurh gurk guro gurr gurt guru guth guto gutt gutu hbtu hhgg hhhh hkbu hobo hogg hogh hogo hogu hoho hoko hoku hook hoor hoot horg hork horo horr hort hotb hoth hoto hotr hott hotu houk hour hout hrob hrtb htoh htrk httr hubb hubo hugg hugh hugo huhu huor huot hurk huro hurr hurt huru huth huto hutt hutu huub kbbb kbbg kbbk kbbo kbbr kbbt kbbu kbgb kbgg kbgh kbgo kbgr kbgt kbhb kbhh kbhr kbht kbkb kbkg kbkk kbko kbkr kbob kbok kboo kbot kbrb kbrg kbrh kbrk kbro kbrt kbru kbtb kbtk kbto kbtr kbtt kbub kbuk kbur kbut kbuu kgbb kgbr kgbt kggg kggo kggr kghr kght kgor kgot kgou kgrb kgrg kgrk kgro kgrr kgrt kgtk kgto khbr khbt khgg khhg khhk khho khkk khkr khob khok khor khot khou khrk khro khrr khrt khtb khth khtk khto khtr khtt khub khug khuk khur khut kkbb kkbg kkbo kkbr kkbt kkgb kkgo kkgr kkhb kkhh kkhk kkhr kkkk kkob kkoh kkoo kkor kkot kkrb kkrh kkrk kkro kkrr kkrt kktk kktu kkut kkuu kobb kobk kobo kobr kobu kogb kogg kogh kogo kogt kogu kohh koho kohr koht kohu kokb kokh kokk koko kokr koku koob koog kook kooo koor koot koou korb korg kork koro korr kort koru kotb koth kotk koto kotr kott kotu koub kour kout kouu krbb krbg krbk krbr krbt krgt krkh krkk krko krkr krku krob krog kroh krok kroo kror krrb krrg krrk krro krrr krrt krth krtk krto krtr krug kruh kruk krur ktbb ktbg ktbr ktbt ktbu ktgg ktgo ktgr kthh kthk ktho kthr ktht kthu ktkb ktkk ktko ktkr ktkt ktku ktob ktoh ktok ktoo ktor ktot ktrb ktrg ktrh ktrk ktro ktrr ktrt ktru kttg ktth kttk ktto kttr kttt kttu ktub ktug ktuh kubb kubo kubr kubu kugb kugo kugr kuht kuhu kukh kukk kuku kuok kuoo kurb kurk kuro kurr kurt kuru kuth kuto kutr kutt kutu kuub kuuk kuur kuuu obbo obkb obok obor obot obrh obro obuh ogb oght ogog ogou ogro ohgr ohho ohob ohoh ohok ohto ohtu okgo okko okok okor okot okro okto okur ooho ooku oooh oooo oort ootb orbb orbo orbu orgo orko oro- orok oror orot orro orth orto orub otho othr oto- otog otoh otok 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 rokh rokk roko rokr roku roob roog rook roor root rork roro rort roru rotg roth rotk roto rotr rott roub rouh rouk rout rrrr rthk rtkg rubb rubu rugg rugh ruhh ruhr rukh rukk ruku ruok ruro ruru ruth ruto rutt rutu tbrb thog thoo thor thot thou thro thru thtb thtr thug thuk thur tkkg tobo tobt tobu togh togo togr togt toho tohu toko toku tooh took toor toot torg tork toro torr tort toru toth toto totr tott toug touh touk tour tout trog troo trot trou trtr trub trug truk trut truu ttbb ttkg tttt tubb tubo tubr tubu tugg tugh tugu tuht tuhu tuko tuor turb turg turk turo turr turt turu tuto tutt tutu tuuo ubbo uggo uggt ugro ugur uguu uhoh uhok uhuh ukko ukok ukur uor- urgh urgu urho uro- urok uroo urrh urth uruk urur urut utor utto uttu utug uuuu