-hou bbbb bbch bbeb bbrc bcbc bccc bcec bcer bche bcor bcru bcuc bcvo bebb bebe bebo bech becu beeb beer behr beo- beor berc bere bero berr beru beur bevo bhcc bher bhor bhur bhuu bobb bobe bobo bobu boce boch boco bocu boec boee boeo boer boho bohr bohu boob booc booe booh boor bor- bore borh boro borr boru boue bouh bour bove bovo brcb brce breb brec bree breo brer brev brob broc broe broh broo bror brou brrr bruc brue bruh bruv bubb bube bubo bubu bucc buce buch buco bucu buer bueu buhe buho buhr bur- burb bure burh buro burr buru buve c-bo cbbc cbcc cbce cbcr cbcu cbec cbee cber cbre cbrh cbvb cbve cbvr ccbc cccb cccc cccu cccv ccee cche cchr ccob ccoc ccrc ccre ccuc ccvo cebu cec- cece ceco ceeb ceec ceor ceou cer- cerc cere cero cevo chce chch cheb chec chee cheh cher cheu chev choc choh choo chor chou chov chrb chrc chro chrr chub chur chvo cobb cobe cobh cobo cobu coce coch coco cocu coho coob cooh cor- corb corc core coro corr coub coue cour cove covo crbc crbu crcc crce crcr cre- creb crec cree creh creo creu crob croc croe croh croo cror crub crue cub- cubb cube cucc cuce cuer curb cure curo curr cuve cvcc cver cvrr ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ebru ebur ecbc ecbe eccb eccc ecce ecco eche echo eco- ecou ecrc ecrr ecru ecrv eeee eeoc eerc eero ehcc eheh eher eheu ehre eore erbb erbe ercc erce erch ereb erec erer erev erhc erhu erob eroc eroe eroo errc erre erro erub eruc eruh erur eruv erve eubc euch euer eur- eurc eure euro ever evoe evoo evre hboc hcbc hccb hccc hcch hebb hebe hebo hebr hech heeb heer hehe heho heor heou herb herc here hero herr heru heue heur heve hhhh hobe hobo hoce hoch hocr hoer hohe hoho hooe hoor horc hore horo horr houe hour hove hree hrob hrrc hubb hube hubo huch hucu huer huhu huor hure huro hurr huru huub huve hvcc o-eo obbo obec ober oboe obor obre obrh obro obuh ocbc occc oce ocee oche ocre ocro ocrr ocur oec- oecc oeec oere ohbe ohcc ohee oher ohho ohob ohoh ohre oobe oocr ooer ooho oooh oooo oore orbb orbe orbo orbu orce orch orco ore- oreb orec oreh oreo orer orhe oro- oroe oror orro orub orve orvr oucc ouch ouer our- oure ouro ouu- ovee over ovo- ovoo ovre rbbb rbbr rboh rcbc rcbo rccb rccc rchb rcuv rcvr rebb rebe rebo rebu recc rece rech recr recu reeb reev rehb rehe reou rere rero reru reue reuu reve revo rhce rheb rhee rheo rhob rhoc rhoh rhue rob- robb robe robo robu rocc roce roch roco roer roev rohe rohr rohu roob roor rorc rore roro roru roub roue rouh rove rovo rrrr rubb rube rubu ruce ruch ruer ruhe ruhh ruhr rurc rure ruro ruru ruve ruvu rv-c rver rvvh ubbe ubbo uber uboc ucbc uche ucho ucrc uher uhoh uhuh uocc uor- uore uovo urbe urch ure- ureh urho uro- uroo urre urrh urur urve uuoc uuuu uv-b uv-c uver uvvu vbcc vche vecc vech veer veho veoh veor ver- verb vere vero veur veve vevo vhhh voce voer voeu voho vohu vooc voor vor- vore voro voru voue vouh vour vreo vrhe vroc vuco vurb vver vvob vvvv