-er -ol bbb bbe bbl bbo bbr bbt be- beb bee bel beo ber bet bev blb ble bll blo blr blt blv bob boe bol boo bor bot bov brb bre brl bro brr brt brv btb bte btl bto btr btt btv bvb bve bvl bvo bvr bvt bvv ebb ebe ebl ebo ebr ebt ebv eeb eee eel eeo eer eet eev elb ele ell elo elr elt elv eo- eob eoe eol eoo eor eot erb ere erl ero err ert erv etb ete etl eto etr ett etv evb eve evl evo evr evt evv lbb lbe lbl lbo lbr lbt lbv leb lee lel leo ler let lev llb lle lll llo llr llt llv lob loe lol loo lor lot lov lrb lro lrr lrt lrv ltb lte ltl lto ltr ltt ltv lvb lve lvl lvr lvt lvv ob- obb obe obl obo obr obt obv oeb oee oel oeo oer oet olb ole oll olo olt oo- oob ool ooo oor oot oov or- orb ore orl oro orr ort orv ot- otb ote otl oto otr ott otv ov- ovb ove ovl ovo ovv rbb rbe rbl rbo rbr rbt re- reb ree rel reo rer ret rev rle rll rlo rlr rlt rob roe rol roo ror rot rov rrb rrl rrr rrt rtb rte rtl rto rtr rtt rtv rvb rve rvl rvo rvr rvt rvv tbb tbe tbl tbo tbr tbt tbv te- teb tee tel teo ter tet tev tle tll tlo tlr tlt tlv to- tob toe tol too tor tot tov trb tre trl tro trr trt trv ttb tte ttl tto ttr ttt ttv tvb tve tvl tvo tvr tvt v-e vbl vbo vbr vbv veb vee vel veo ver vet vl- vlb vle vll vlo vlt vlv vob voe vol voo vor vot vov vrb vre vrr vrt vtb vte vtl vto vtr vtt vtv vvb vvo vvr vvt vvv

bbbb bbeb bbet bblb bebb bebe bebo beeb beel beer beet bele bell belo belt beo- beor beot bere bero berr bert bete beto bett betv bevo blbt bleb blee bleo blet blob bloo blot blvt bobb bobe bobo boee boel boeo boer boet bole boll bolo bolt boob booe bool boor boot bor- bore boro borr bort botb bote boto bott bove bovo breb bree brel breo brer bret brev brob broe brol broo bror brot brrr btob btor btrt bttb ebbo ebbr ebel eber eboe ebol eboo ebor ebro eeee eele eelv eero eete el-b elbe elbo elee eleo eler elet elev elle ello elro elte elto elve elvo eole eolo eore eorl eoto erbb erbe ereb erel erer eret erev erle erll erob eroe erol eroo erre erro ertl erve etbr etee etel eter etoe etre etro ette etto etvo evel ever evet evoe evol evoo evre lblr lbrt lebo leel leer leet lele lell lelo leor leov lere lero lert lete leto lett lev- leve levo llet llll lloo lo-v lob- lobb lobe lobo loeb lole loll lolo loob looe lool loor loot lore loro lote lotl loto lotr lott lotv love lovo lrrr lrtv ltbl ltee lttr lttv lvov lvrr o-eo obbo obel ober obet oble oboe obol obor obot obre obro oele oere olbo ole- oleo oler olet olev olle ollo olor olot olov oobe ooer oolo oooo oore oort ootb orbb orbe orbo ore- oreb orel oreo orer orle orlo oro- oroe oror orot orro orte orto orve orvr otee oter oto- otoe otoo otor otov otre otro otte otto ovee over ovet ovo- ovol ovoo ovot ovre rbbb rbbr rble rebb rebe rebo reeb reel reet reev relb rele rell relo relt reol reot rere rero rert rete reto retr rett reve revo rlee rob- robb robe robo robt roel roer roet roev role roll rolo rolt roob rool roor root rore roro rort rote rotl roto rotr rott rove rovo rrle rrrr rtee rtle rtlt rtve rver tbrb tebo teel teer teet teev tel- tele tell telo telt teor ter- tere tero terr tete teto tetr tett tevl tobe tobo tobt toee toer toet tol- tole toll tolo tolt tool toor toot tore toro torr tort torv tote toto totr tott tove tovo tre- tree treo tret trev troe troo trot trte trtr trvl ttbb tteo tter ttoe tttt tvel tver tvro tvrr tvtv veel veer veet vel- vele vell velo velt veol veor ver- verb vere verl vero vert vete veto vetr veve vevo vlvt voel voer voet vole voll volo volt vool voor voot vor- vore voro vort vote voto vrbl vreo vret vrot vrto vtol vtvl vver vvob vvvv

-tree bbbee be-er be-ro bebel beber beblo bebot beebe beele beete beeve belbo belee belet bellb belle bello belot belov beote berbe berel beret berle berlo berob beroe berol beror berre berte berto betee betel beter betle betoo betor betre bett- bette betto bevel bever bevor bleer bleet blere blete bleve bloor blorb blore blort blote bloto blott bo-bo bobet boble bobov bobr bobre boeol boero bolbe bolel boleo boler bolet boll- bolle bollo bolte bolto booer boole boore boort borbo boree borel borer boret borle boro- boroo borot borov borre borro borve borvo botel botet botev botro botte bovee bovel breel breer breet brell brelo breo- brere breto brett breve brobo broer brole broll brolo brool broto brrrr btr-t ebber ebbet ebble ebell ebelo eberl ebert eeeee eeler eevee eever elbot eleet elele eleo- eleot eleve ellel eller ellet elloe eloee elole eloor elore eloro elote elrob eltro elver elvet eorre erbbe erber erere ereve eroor erore eroto errol error erte ertel erter etete etoll etool etoro etree ettel etter ettle evell evere evero everr evert evete evett eveve evolo evolv evoor evote evvol lebel leber lebet leell leere leert leeve lelle lelov leove lerer lerot letbe letot letov letre lette letto levee level lever levet levo- levor levre lobbe lobbo lober loble lobo- lobor lobov loeve loler lollo lolol