ktbb ktbc ktbr ktbt ktbu ktcc ktce ktck ktcr ktec ktee ktek ktep ktkb ktkc ktke ktkk ktkr ktkt ktku ktpk ktpr ktpt ktrb ktrc ktre ktrk ktrp ktrr ktrt ktru kttc kttk kttp kttr kttt kttu ktub ktuc kubb kubc kube kubr kubu kucb kucc kuce kucp kucr kuek kueu kuke kukk kuku kupb kupe kupr kupt kupu kurb kure kurk kurr kurt kuru kute kutp kutr kutt kutu kuub kuuk kuur kuuu pbcc pbpk pcbc pccc pcce pcep pcer pcpb pcpp pcrc pcre pcte pece peck pecr pect peec peek peep peer peet peke pekk pepe per- perc pere perk perp perr pert peru pete petr pett peur peut ppcc pper pppp pprc ppru pptt ppur prbc prcc prcp pre- preb prec pree prek prep pret preu prtc prtp prtr prue prut pruu ptcc pter pttc pttk pu-e pube pubu puce puck puer puet pueu puke puku pupe pupu pur- purb pure purp purr puru put- pute putt putu puuc rbbb rbbr rcbc rccb rccc rcep rcet rcpt rctc rebb rebe rebk rebu recc rece reck recp recr rect recu reeb reek reep reet reke rekt repe repp repr rept repu rere rert reru rete retr rett reue reuk reup reut reuu rpet rrrr rtcc rtce rtee rttp rubb rube rubp rubu ruce ruck ruct ruer ruet ruke rukk ruku rupe rupp rupt rurc rure rurp ruru rute rutt rutu tbcb tbcc tbce tbrb tbtp tccc tccu tcep tctc tebu teck tecr tect teec teek teer teet teke tepe tepp tepu ter- terc tere terk terp terr teru tete tetr tett tetu teuk teut tpck tpcp tper tpke tppp tppr tpte tptp tptr tput trcc tre- trec tree trek tret treu trpc trpe trpp trtc trte trtr trub truc true truk trut truu ttbb ttcp tter tttt tubb tube tubr tubu tucc tuck tuer tuet tuke tupe tupu turb turc ture turk turp turr turt turu tute tutt tutu u-rp ubbe ubek uber ubet ubpc ucbc uccp ucpb ucrc ucut ukcc ukek ukeu ukrc ukup ukur upbe uppc uppe uppp uppu upup urbe ure- uret urke urre urte uruk urup urur urut utec utep uter uttu uucp uuuu

-tree b-r-k bbbee bccup be-er bebek beber becke becue becut beebe beeke beete beeut beker bekke beppe beppu berbe berck bercu berec berek beret berk- berke berre berru berte betee beter betke betre bett- bette beuer beure beute brebu brece breck breek breer breet breke brere brett breu- brrrr bruce bruck bruer bruet bruke brute btc-e btr-t bubbe buber bucek bucet bucku bucur buker buket bukk- burck burcu burek buret burke burru burte burtt buruc buruk burut butec buter butke butte butut c-p-c c-tec ccccc ccett cebec ceber cebpb cebpe ceere cepet cerbu cerc- cerce cerec cerer ceret cerke cerre certe cette cpctc crebe crece creek creep creer creke crepe crept crepu crete cretu creu- creue creup cruce cruck cruet cruke crupe crure cteep ctree cttee cubbe cubeb cuber cubub cucuk cueup cuker cuper cupr- curce curer curet curre curup cutcu cutee cuter cutup ebber ebbet ebert ebure eccup ecker eecke eeeee eepee ekker ekuku ekuru eperc epptb epuku epure erbbe erber erect erept erere erkec errtu erte erter eruct eruke erupt eteke etete etree etrek etter eturu eucre eurre k-p-r k-t-b k-ute kebbe kebek keber kecer keepe keere kekec keppe kerek kerep keret kerre kertu ketek keter kette krbpe kreek kreep kreke krepe krete kreuk krupp kubek kuber kucer kucuk kukec kukup kukur kupce kuper kuppe kupur kurbu kurek kurku kurre kurte kuruc kuruk kurup kutte kuttu kutur p-rep pcept pcert pctct pebre pecke peebu peece peeke peere peert peete peket pekre pepee peppe pept- pepup perce perec perer peret perke perre perte peruc perur petbe petcu peter petr- petre petru pette petur peuce peure pre-k prece preke prete preuk prkce pruce prute ptcrb pter- ptere ptprb ptprc ptpre ptprk ptprr ptprt ptpru puber puett puker pupet puppe purce puree purer purku purre purte puter putre putt- putte puttu putup re-up rebbe rebec reber rebet rebut recce recep recet recke recpt rect- recte recue recur recut reece reepe reere rekke repec repet reppe reprt repub reput rere- reree reret retee reter rette reuer reuet reute rt-rk rubee ruber rubke rubup rucer ruere ruete rukke rupee ruper rurec ruter rutte ruutu tbtbt tbutt tcutk teber tebet tebuk tectb teepe teeup teket tekke tepee tepet tepeu tepke teppu terce terek teret tereu terre tert- teter tetr- tette trbuk treck treer treet trepp trept trere trete trett treut trubu truce truck truer truke trupt trute ttttt tubek tuber tucep tucet tucke tuctu tukur tupee tupek turbe turbt turck turek turet turku turre turtu turup turut tutee tutku tutte tuuru u-cee uber- uceku ukeep ukeke ukert upc-e upcut upeet upper upput upter urker urkut urpek urter urubu uruce urucu urupe urutu uter- utter uttur utube uturu uuuuu

b-tree bbbbbb becker becket becure beebee beeker beeper beeter bekker berbee berber bercke bereet bereke berere berker berkut berrer berret bertre berube betere betete betrue bettee better betutu beurre breere brekke bretcu brette breuer brubru bruker bruket bruree bubber bububu bucker bucket buckup bukett bukkur bukuru burbet burbur burcer burket burkut burpee burper burree burrer burret burrup buruku burutu butere butter butucu c-cube ceecee cepure cerete ceruce creeke creete creket crupet ctcpec cubber cubeck cubert cubube cucube cucurb cupper curber curepe curete currer curret curter cut-up cutcut cuttee cutter cutupu ebbert eburru eckert eebree eerect erbree erketu errett etcetc ettutu eutere k-rupt k-tree kebber keeker keeper keepup kekkut kepper keptup kerber kereru kerker kerkuk kertee ketter ketuke keuper keuruu kreker kretek krueck krupke krupuk kubeer kukere kupper kurkcu kurper kurree kurupt kururu kutke kutter p-cube pberet pebete pecker pecket peeker peepee peeper peerce peerer peeter peetre pepper percee percer percur perere peretu perkuc perkup perper perpet perree perret pertek perter pertre peruke pet-ct peteet peteru petree petrer petruk petter pettet pppppp precut preece preeue preket prepub preter pretre prette preue- prkeet pruett pturek pubber pucker pucket puerer pukeru pukete pukree puppet pupput pureke purete purpre purpur