-er b-u bbb bbe bbm bbo bbr bbt bbu be- beb bee bem beo ber bet beu bmb bme bmm bmo bmr bmt bmu bob boe bom boo bor bot bou brb bre brm bro brr brt bru btb bte btm bto btr btt btu bub bue bum buo bur but buu ebb ebe ebm ebo ebr ebt ebu eeb eee eem eeo eer eet em- emb eme emm emo emr emt emu eo- eob eoe eom eoo eor eot eou erb ere erm ero err ert eru etb ete etm eto etr ett etu eu- eub eue eur eut m-o m-r mbb mbe mbm mbo mbr mbt mbu meb mee mem meo mer met meu mmb mme mmm mmo mmr mmt mmu mob moe mom moo mor mot mou mrb mre mrm mro mrr mrt mru mtb mte mtm mto mtr mtt mtu mub mue mum mur mut muu ob- obb obe obm obo obr obt obu oeb oee oem oeo oer oet om- omb ome omm omo omr omt omu oo- oob oom ooo oor oot or- orb ore orm oro orr ort oru ot- otb ote otm oto otr ott otu ou- oue oum ouo our out rbb rbe rbm rbo rbr rbt rbu re- reb ree rem reo rer ret reu rmb rme rmm rmo rmr rmt rob roe rom roo ror rot rou rrb rrm rrr rrt rru rtb rte rtm rto rtr rtt rtu rub rue rum ruo rur rut ruu tbb tbe tbm tbo tbr tbt tbu te- teb tee tem teo ter tet teu tmb tme tmm tmo tmr tmt tmu to- tob toe tom too tor tot tou trb tre trm tro trr trt tru ttb tte ttm tto ttr ttt ttu tub tue tum tuo tur tut tuu ubb ube ubo ubr ubt ubu ueb uee uem uer uet um- umb ume umm umo umr umt umu uob uoe uom uoo uor uot ur- urb ure urm uro urr urt uru utb ute utm uto utr utt utu uue uum uur uut uuu

bbbb bbeb bbet bebb bebe bebo beeb beem beer beet beme bemu beo- beor beot bere berm bero berr bert beru bete beto bett betu beur bobb bobe bobo bobu boee boeo boer boet bomb bome bomt bomu boob booe boom boor boot bor- bore borm boro borr bort boru botb bote boto bott boue boum bour bout breb bree brem breo brer bret brob broe brom broo bror brot brou brrm brrr brue brum brut btob btor btrt bttb bubb bube bubo bubu buem buer bueu bum- bumb bur- burb bure burm buro burr burt buru but- bute buto butt ebbo ebbr eber eboe eboo ebor ebro ebru ebur eeee eemo eero eete eetu embe embo embr emer emet emeu emme emmu emor emre emte eore eoto erbb erbe ereb erem erer eret erme ermo erob eroe eroo erre erro ertu erub erum erur etbr etee etem eter etoe etre etrm etro ette etto ettu euer eur- eure euro eurt mbou mebe mebo meem meer meet meme memo memr memu meor meou mer- merb mere merm mero mert meru met- mete meto mett metu meum mmmm mmor mobb mobe mobo moet mome momo momu moob mooe moor moot morb more moro mort moru motb mote motm moto mott motu moue mour mout mrbb mrbm mreb mree mrtm mrtt mtbo mtoe mtom mtor mtre mtrr mttr mube mubo muee muet mume mumm mumo mumu mure muro murr murt muru mute muto mutt mutu muut o-eo obbo ober obet oboe obor obot obre obro oeme oere oerm ombe ombo ombu omee omeo omer omet omo- omoe omoo omor omre omro omuo oobe ooer oome oooo oore oort ootb orbb orbe orbo orbu ore- oreb orem oreo orer orme ormo oro- oroe orom oror orot orro orte orto orub orum otee otem oter oto- otoe otoo otor otre otro otte otto ottu otur ouer oume our- oure ouro ourt out- outb oute outo ouu- rbbb rbbr rebb rebe rebo rebu reeb reem reet reme remo reot reou rere rero rert reru rete reto retr rett reue reut reuu rmtu rob- robb robe robo robt robu roer roet romb rome romm romo roob room roor root rore roro rort roru rote roto rotr rott roub roue roum rout rrrr rrum rtee rubb rube rubu ruer ruet rumb rume rumm rumo rumt rure ruro ruru rute ruto rutt rutu t-mo tbrb tebo tebu teem teer teet teme temo temu teom teor ter- tere term tero terr teru tete teto tetr tett tetu teut tmbr tmou tmro tmtt tobe tobo tobt tobu toee toer toet tomb tome tomm tomo tomt toom toor toot tore torm toro torr tort toru tote totm toto totr tott toum tour tout tre- tree trem treo tret treu trmb trmu troe trom troo trot trou trte trtr trub true trut truu ttbb tteo tter ttoe tttt tubb tube tubo tubr tubu tuer tuet tumb tume tumu tuor turb ture turm turo turr turt turu tute tuto tutt tutu tuum tuuo ubbe ubbo uber ubet umb- umbe umbo umer umet ummo umoe umor umut uomo uor- uore urbe ure- uret uro- urom uroo urre urte urum urur urut uter utmb utor utto uttu uuuu

-tree bbbee be-er be-ro beber bebot beebe beete beeut bembe bembo bemer bemet beote beour berbe beret berme bermo berob beroe berom beror berre berru berte berto berum betee beter betoo betor betou betre bett- bette betto beuer beure beute bo-bo bobet bobr bobre boeme boero boeur bombe bombo bomer bomet bomme booer boomb boore boort booru borbo boree borer boret bormo boro- borom boroo borot borou borre borro borum borut botet botme botom botou botro botte bottu bouee bouer bouet boure boute bouto brebu breem breer breet breme bremm bremo breo- brere breto brett breu- brmmm brobo broer brom- brome bromo broom broto broue brout brrrr bruer bruet brume brumm brute btr-t bubbe buber bumbo bumbu bumme buret buroo burro burru burte burtt