-er -ol bbb bbe bbl bbo bbr bbt bbx be- beb bee bel beo ber bet bex blb ble bll blo blr blt blx bob boe bol boo bor bot box brb bre brl bro brr brt brx btb bte btl bto btr btt btx bxb bxl bxo bxx ebb ebe ebl ebo ebr ebt ebx eeb eee eel eeo eer eet eex elb ele ell elo elr elt elx eo- eob eoe eol eoo eor eot erb ere erl ero err ert etb ete etl eto etr ett etx ex- exe exl exo exr ext exx lbb lbe lbl lbo lbr lbt lbx leb lee lel leo ler let lex llb lle lll llo llr llt lob loe lol loo lor lot lox lrb lro lrr lrt ltb lte ltl lto ltr ltt ltx lxo lxr lxx ob- obb obe obl obo obr obt obx oeb oee oel oeo oer oet oex olb ole oll olo olt oo- oob ool ooo oor oot oox or- orb ore orl oro orr ort orx ot- otb ote otl oto otr ott ox- oxb oxo oxt oxx rbb rbe rbl rbo rbr rbt rbx re- reb ree rel reo rer ret rex rle rll rlo rlr rlt rob roe rol roo ror rot rox rrb rrl rrr rrt rtb rte rtl rto rtr rtt rtx rxr t-x tbb tbe tbl tbo tbr tbt te- teb tee tel teo ter tet tex tle tll tlo tlr tlt tlx to- tob toe tol too tor tot tox trb tre trl tro trr trt trx ttb tte ttl tto ttr ttt ttx txe txl txt xbe xbl xbr xbx xee xel xer xet xex xlb xlr xlt xoo xor xot xox xrt xrx xtr xtx xxl xxo xxx

bbbb bbeb bbet bblb bbox bebb bebe bebo beeb beel beer beet bele bell belo belt beo- beor beot bere bero berr bert bete beto bett blbt bleb blee bleo blet blob bloo blot bobb bobe bobo boee boel boeo boer boet bole boll bolo bolt boob booe bool boor boot boox bor- bore boro borr bort botb bote boto bott breb bree brel breo brer bret brex brob broe brol broo bror brot brox brrr btex btob btor btrt bttb ebbo ebbr ebel eber eboe ebol eboo ebor ebox ebro eeee eele eero eete eext el-b elbe elbo elee eleo eler elet elex elle ello elro elte elto eole eolo eore eorl eoto er-x erbb erbe ereb erel erer eret erle erll erob eroe erol eroo erre erro ertl etbr etee etel eter etoe etox etre etro ette etto exel exer exo- exor exrx exte extl extr lblr lbrt lebo leel leer leet lele lell lelo leor leox lere lero lert lete leto lett lext lexx llet llll lloo lob- lobb lobe lobo loeb lole loll lolo loob looe lool loor loot lore loro lote lotl loto lotr lott lox- loxo lrrr ltbl ltee lttr lxxx o-eo obbo obel ober obet obex oble oboe obol obor obot obox obre obro oele oere olbo ole- oleo oler olet olle ollo olor olot oobe ooer oolo oooo oore oort ootb orbb orbe orbo ore- oreb orel oreo orer orex orle orlo oro- oroe oror orot orro orte orto otee oter oto- otoe otoo otor otre otro otte otto oxer oxo- oxox oxxo rbbb rbbr rble rebb rebe rebo reeb reel reet relb rele rell relo relt reol reot rere rero rert rete reto retr rett rexx rlee rob- robb robe robo robt roel roer roet role roll rolo rolt roob rool roor root roox rore roro rort rote rotl roto rotr rott roxo rrle rrrr rtee rtex rtle rtlt tbox tbrb tebo teel teer teet tel- tele tell telo telt teor ter- tere tero terr tete teto tetr tett tetx text tltx tobe tobo tobt toee toer toet tol- tole toll tolo tolt tool toor toot tore toro torr tort torx tote toto totr tott tox- toxo toxt tre- tree treo tret trex troe troo trot trox trte trtr ttbb tteo tter ttoe tttt txtr xbee xbel xbox xbrl xeer xer- xero xert xexe xlet xlox xolo xoro xote xoxo xtol xtro xxxo xxxx

-tree bbbee be-er be-ro bebel beber beblo bebot bebox beebe beele beete belbo belee belet bellb belle bello belot beote berbe berel beret berle berlo berob beroe berol beror berre berte berto betee betel beter betle betoo betor betre bett- bette betto bexel bleer bleet blere blete bloor blorb blore blort blote bloto blott bloxr bo-bo bobet boble bobr bobre boeol boero bolbe bolel boleo boler bolet bolex boll- bolle bollo bolte bolto booer boole boore boort bootx borbo boree borel borer boret borex borle boro- boroo borot borox borre borro botel botet botox botro botte boxbe boxee boxer bre-x breel breer breet brell brelo breo- brere breto brett bretx brobo broer brole broll brolo brool broto brrrr btr-t e-box ebber ebbet ebble ebell ebelo eberl ebert eblex eeeee eeler elbot eleet elele eleo- eleot ellel eller ellet elloe eloee elole eloor elore eloro elote elrob eltro eorre erbbe erber erere eroor erore eroto errol error erte ertel erter etete etext etoll etool etoro etree ettel etter ettle exert exlex exloo exorb exore exort extel exter extol extre extro lebel leber lebet leell leere leert lelex lelle lerer lerot letbe letot letre lette letto lexer lexoo lexxe lo-ex lobbe lobbo lober loble lobo- lobor loler lollo lolol looer loore loote lorel loreo lorer loret lorre lotor lotte lotto loxo- o-r-b obbet obele obert obete obole obolo oboro obote obreb oelet oerel oerle oleo- olere olleo oller oltet oltre oo-er ooooo orble orbot orell oreo- orere orero orexo orlet orobe orobo oroer orret orter ortet ortoo otell otelo otere otero otole otolo ototo otter oxole oxter rebbe rebel reber rebet rebol rebox reere relee relet relex rello relot relte reorx rere- reree reret rerob retee retel reter retex retox retro rette retto rexel rexer ro-ro robbe robbo rober roble robo- robor robot robrt robte roell