-hou bbbb bbeb bebb bebe bebo beeb beer behr beo- beor bere bero berr beru beur beze bezu bher bhor bhur bhuu bobb bobe bobo bobu boee boeo boer boho bohr bohu boob booe booh boor booz bor- bore borh boro borr boru borz boue bouh bour bozo breb bree breo brer brez brob broe broh broo bror brou broz brrr brue bruh bruz bubb bube bubo bubu buer bueu buhe buho buhr bur- burb bure burh buro burr buru burz buuz buze buzz bzer bzoe bzou bzzz ebbo ebbr eber eboe eboo ebor ebro ebru ebur eeee eero eeze eheh eher eheu ehre eore erbb erbe ereb erer erez erhu erob eroe eroo erre erro erub eruh erur euer eur- eure euro ezer ezuz ezzo hebb hebe hebo hebr heeb heer hehe heho heor heou herb here hero herr heru herz heue heur heze hhhh hobe hobo hoer hohe hoho hooe hoor hore horo horr houe hour hoze hozo hree hrob hubb hube hubo huer huez huhu huor hure huro hurr huru hurz huub huzz o-eo obbo ober oboe obor obre obrh obro obuh oere ohbe ohee oher ohho ohob ohoh ohre oobe ooer ooho oooh oooo oore ooze orbb orbe orbo orbu ore- oreb oreh oreo orer orhe oro- oroe oror oroz orro orub orzo orzu ouer our- oure ouro ouu- ouze ouzo ozee ozer rbbb rbbr rboh rebb rebe rebo rebu reeb rehb rehe reou rere rero reru reue reuu reze rezh rezu rheb rhee rheo rhob rhoh rhue rob- robb robe robo robu roer rohe rohr rohu roob roor rooz rore roro roru roub roue rouh rouz roze rozz rrrr rubb rube rubu ruer ruez ruhe ruhh ruhr rure ruro ruru ruze ubbe ubbo uber uher uhoh uhuh uor- uore urbe ure- ureh urho uro- uroo urre urrh urur uruz uuuu uzeb uzer uzuh z-ro zber zebe zebu zero zeze zhee zhob zhor zhou zhuo zhur zhuz zobo zohr zoo- zorb zore zoro zozo zozu zrze zubo zubr zubu zuhr zuoz zurb zurr zuru zuzu zzhz zzzz