-hou bbbb bbrg bfgf bhff bhog bhor bhur bhuu bobb bobo bobu boff bofh bofu bogg bogh bogo boho bohr bohu boob boof boog booh boor bor- borf borg borh boro borr boru bouf bouh bour brfu brob brog broh broo bror brou brrr brug bruh bubb bubo bubu buff bufo bufr bugg bugh bugo buho buhr bur- burb burg burh buro burr buru ffff ffrr fofo fogg fogh fogo fohr foof for- forb forg foro forr foug four frob frog froh frou frub frug fubb fubu fuff fufu fugh fugo fugu fuor fur- furg furo furr gbbo gfor ggfg gggg gghg ghrf ghug gobo goff gofr gofu gogh gogo gohb goof goog goor gorb gorf gorg goro gorr gou- gouf goug gour grbr grob grof grog groh groo gror grou grrr grub gruf grug grur gubb gubu guff gugb gugg gugh gugu guhr gurb gurg gurh guro gurr guru hhgg hhhh hhof hobo hoff hofu hogg hogh hogo hogu hoho hoof hoor horg horo horr houf hour hrob hubb hubo huff hufu hugg hugh hugo huhu huor huro hurr huru huub obbo obor obrh obro obuh off- offh offo offr offu ofgo ofor ogb ogfr ogog ogou ogro ohgr ohho ohob ohoh ooff ooho oooh oooo orbb orbo orbu orff orfu orgo oro- orof oror orro orub ouff ough our- ouro ouu- rbbb rbbr rbgh rboh rhbg rhob rhog rhoh rhug rob- robb robo robu roff rofo rogg rogh rogo rohr rohu roob roof roog roor roro roru roub rouf rouh rrrr rubb rubu ruff rufo rugg rugh ruhh ruhr ruro ruru ubbo uggo ugro ugur uguu uhoh uhuh uofg uofo uor- urff urgh urgu urho uro- uroo urrh urur uuuu