fere ferr fert fete feti fetr fett ffcc ffee ffff ffii ffrr fftf fibe ficc fice fict fidc fide fidf fiec fief fier fifc fife fiff fifi fift fiii fire fitc fite fiti fitt frbc frcc fred free frei fret frfc frib fric frid frie frit ft-c ftcd ftdi fter ftfc ftii i-be ibec ibed ibet ibfi ibid ibie ibrc ibrd ibri ibtb ibtc icbc icbd iccb iccc iccf icci iccr icct icdc icdd icde icec iced icee icef icer icet icfb icrc icre icrf icrr icrt idbe idce idcr idec ided idee idef ider idfc idic idid idie idir idrc idre idrf iecc iedr ieet ieie iere ieri ietf iett ifbb ifcd ifer ific ifid ifit ifrb ifrf ifri iicd iide iied iiie iiii iiit iirc iitr iitt irbe ircc ircd irdc ired iree irer irfe iri- iric irid irie irrc irre irri irte irtf irti itbe itec iter itet itic itie itif itrf itri ittf rbbb rbbr rcbc rccb rccc rcdc rcde rcet rcfc rcic rcid rcrd rctc rcti rder rebb rebe recc recd rece reci recr rect redc redd rede redi redr reeb reed reef reet refd refe reff refi refr reft reid reif reii reir reit rerd rere reri rert retd rete reti retr rett rfdi rfef rffc rfic rfid rftc rib- ribe ricc rice rict ridc ridd ride ridi ried rief rier riet rife riff rift riif rire riri rite riti ritt rred rrfc rrif rrrr rtbf rtcc rtce rtdt rtee rtei rtfb rtfc tbcb tbcc tbcd tbce tbit tbrb tccc tcdd tcfc tctc tddb tdff tdri tecr tect tedd tede tedi teec teed teef teer teet tefc teff tefi teft teic teie teir ter- terc tere terf teri terr tete teti tetr tett tfdc tfeb tfec tftc tibi ticc tice tidc tidd tide tie- tied tiee tief tiei tier tiet tiff tift tiit tirb tird tire tiri tirr titc tite titi titt trcc tre- trec tred tree tref trei tret trfc trfd trfr tri- trib tric trie trif trit trtc trte trtr ttbb tter ttfc ttff tttt

-tree b-e-d bbbee bcced bcdef bd-re be-er bebed beber bebic bebti becic bedde bedee beder bedet bedid bedri beebe beede beedi beeft beerd beeri beete beffe befie befit beibi beice beide beidi beier beife beird beire beite berbe berde berec bered berei beret berid berie berit berre berri berte berti betee beter betid betie betre bett- bette betti bibbe biber bibic bibie bibri bicer bidde bided bider bidet bidri biebe biefe bierd biere bieri biert bieti bifer biffi bifid biide birde birie bited biter bitit bitte bitti brece bredd brede bredi bredt breed breef breer breet breid breit brerd brere brett bribe brice bride bridi briec brief brier brite britt brrrr btc-e btr-d btr-t c-tec cbeff cbeft ccccc cccii ccett ccifc cciii ccitt cdiii cebec ceber cebid cebit ceci- cecie cecri ceded ceder cedie cedr- cedre ceede ceere ceirt cerc- cerce cerci cerec cered cerer ceret ceric cerid cerie cerre certe cetic cette ciber cibir cicer cideb cider cidre cietc cifer cifft cifte circe ciric cirie cirr- cirri citec cited citee citer citie citr- citte crebe crece crede credi creed creer creft creid crete cribb cribe crice cried crier ctree ctrie cttee dccic dcide ddc-i ddddd debbi debce debed deber debet debie debir debit debrc debte debtf decet deci- decie decir dedde dedee deder dedic dedie dedir dedit deece deede deedi deefe deeff deere defce defed defer defet deffe defib defie deice deidt deiff deite derbe derbi derce derde dered derib deric derre deter detie detre dette dibri diced dicer dicit dicte didee didie didit diebe diece dieci dieri diete dirce dired direr dirfi dirie diter ditib dittd ditti drdre dredd drede dreed dreff dreft dreid dreie drere dride dried drier drife driff drift drite e-dee e-fit ebbed ebber ebbet ebbie ebeid ebert ebibe ebird ecrit ectfe edder eddic eddie eddir eddit eddre edere edict edidi edifi edred eeeee eefde eerde eerie eetti efere eferi efetf effed effer effet effie efird efrei efter eider eidet eirie eiter eitri erbbe erber erdec erdre erect erede erere erfde ericb erice erier eriff eriic erite erred erte erter etete etite etree etter ettie fbcci febre fecit fedde fedee feder feere feier feird ferce ferde ferdi fered feret feric ferid ferie ferit ferr- ferre ferri ferte feted feter feti- fetid fetii fetir fette fiber fibr- fibre ficid fided fidei fidic fieee fieri fifed fifer fifie fired firee firei firer firie firit firre fitit fitri fitte frede fredi freed freei freer freet freir freit frere frett frice fride fried frier frite fritt ftrtt i-bet i-bid ibert ibeti icbrr ice-t iceci icedt iceit icici icier icter ictic idbet idice idied iebet iecee ieiri ierei iette if-- ifere iffet ifrit ifttt iiiee iiiii iitti irbid irbit ircii irece irete irid- iride irite irrit irtec itbit itdid itete itfet itfit itire itter ittre ittti rbied rcirc rebbe rebec reber rebet rebid rebit recce reced recet recit rect- recte recti redbd redde reddi reder redid redie redif redit reece reede reefe reeft reere reeti refdb refed refer refet reffe refit reice reide reiff reird rerde rere- reree reret reric rerir reted retee reter retie rette ri-fi ribbi ribce riber ribet ribie ricci riced ricer ridec rided rider ridic riede riefe rieti rifer riife ririe rtice tbeti tbird tbtbt teber tebet tebi- tecic tectb tedef teder tedie teerd tefe teffi teide teiid terce teret terif terre terri tert- teter tetr- tetri tette ti-ti tibbi tiber tibet ticci ticer tidde tided tider tiede tieit tiere tieri tiffe tired tiree tirer tiret tirit titcr titer titii titre titte titti treed treer treet trefe treff treib treid treie treif treit trere treri trete trett tri-d tribe trice tride trieb tried triei trier triet trife trit- trite tritt ttttt

b-tree bbbbbb bbedit bebite becice bedded bedder bedebt bedirt bedrib bedrid bedrit beebee beedee beedie beefed beefer beerde beeter befree befret beiber berbee berber berede bereet bereft berere beride berrer berret berric berrie bertie bertre betere betete betide betire betted bettee better