-er bbb bbe bbk bbo bbr bbt be- beb bee bek beo ber bet bjj bjk bjr bjt bkb bke bkk bko bkr bkt bob boe boj bok boo bor bot brb bre brj brk bro brr brt btb bte btk bto btr btt ebb ebe ebj ebk ebo ebr ebt eeb eee eek eeo eer eet ejo ejt ekb eke eko ekr ekt eo- eob eoe eok eoo eor eot erb ere erk ero err ert etb ete etj etk eto etr ett jbj jbk jbo jbr jbt jeb jee jej jek jeo jer jet jjb jjj jjk jjr jkb jkk jko jkr jkt job joe joj jok joo jor jot jrb jrk jro jrr jrt jtb jte jtk jtr jtt k-t kbb kbe kbk kbo kbr ke- keb kee kek keo ker ket kjb kje kjr kkb kke kkk kkr kkt kob koe kok koo kor kot krk kro krr krt ktb kte ktj ktk kto ktr ktt ob- obb obe obj obk obo obr obt oeb oee oeo oer oet ojb oje ojo okb oke okj okk oko okr oo- oob ook ooo oor oot or- orb ore ork oro orr ort ot- otb ote otk oto otr ott rbb rbe rbk rbo rbr rbt re- reb ree rek reo rer ret rjk rjr rkb rke rkk rko rkt rob roe roj rok roo ror rot rrb rrk rrr rrt rtb rte rtj rtk rto rtr rtt tbb tbe tbj tbk tbo tbr tbt te- teb tee tej tek teo ter tet tje tjo tjr tkb tke tkk tko tkr tkt to- tob toe toj tok too tor tot trb tre trk tro trr trt ttb tte ttk tto ttr ttt

bbbb bbeb bbet bebb bebe bebo beeb beej beek beer beet beke beko beo- beok beor beot bere berk bero berr bert bete beto bett bobb bobe bobo boee boeo boer boet bojo bojt boke boko boob booe book boor boot bor- bore borj bork boro borr bort botb bote boto bott breb bree brek breo brer bret brje brkb brob broe brok broo bror brot brrr btek btob btor btrt bttb ebbo ebbr eber eboe eboo ebor ebro eeee eeke eero eete ejer ejob ejoo ejot ekeb ekek eker eket eore eoto erbb erbe ereb erer eret erke erob eroe eroo erre erro etbr etee eter etoe etok etre etro ette etto j-ro jbob jebb jebe jeer jeet jeke jeok jere jerk jero jert jetb jete jett jobe jobo joee jojo jokb joke jook joor joot jore jork joro jort joto jott jrbr kbbb kbbe kbbk kbbo kbbr kbbt kbeb kbee kbek kbeo kber kbet kbjk kbjt kbkb kbkk kbko kbkr kbob kboe kbok kboo kbot kbrb kbre kbrj kbrk kbro kbrt kbtb kbte kbtk kbto kbtr kbtt kebb kebe kebr kebt keek keer keet kejb kejj kejo kekb keke keko keoj keok ker- kerb kere kerk kero kerr kert ket- kete ketk keto ketr kett kjbb kjbr kjee kjer kjet kjjj kjjk kjjo kjjr kjjt kjke kjkj kjkk kjkt kjoe kjoj kjok kjor kjot kjrb kjrt kjtt kkbb kkbe kkbj kkbo kkbr kkbt kkjb kkjk kkkj kkkk kkob kkoj kkoo kkor kkot kkrb kkre kkrk kkro kkrr kkrt kktk kobb kobe kobk kobo kobr kojb koje kojo kokb koke kokk koko kokr koob kook kooo koor koot korb kore kork koro korr kort kotb kote kotk koto kotr kott krbb krbe krbk krbr krbt kreb kree krej krek kreo kret krjb krje krjk krjo krjt krke krkk krko krkr krob kroe krok kroo kror krrb krre krrk krro krrr krrt krtk krto krtr ktbb ktbr ktbt ktee ktek ktjj ktkb ktke ktkk ktko ktkr ktkt ktob ktoe ktok ktoo ktor ktot ktrb ktre ktrk ktro ktrr ktrt kttk ktto kttr kttt o-eo obbo ober obet obkb oboe obok obor obot obre obro oere ojok okej oker oket okko okok okor okot okre okro okto oobe ooer oooo oore oort ootb orbb orbe orbo ore- oreb orek oreo orer orke orko oro- oroe orok oror orot orro orte orto otee oter oto- otoe otok otoo otor otre otro otte otto rbbb rbbr rebb rebe rebk rebo reeb reek reet reke reko rekt reot rere rero rert rete reto retr rett rob- robb robe robo robt roer roet roje rojo roke rokk roko rokr roob rook roor root rore rork roro rort rote rotj rotk roto rotr rott rrrr rtee tbrb tebo teej teek teer teet tejo teke teok teor ter- tere terj terk tero terr tete teto tetr tett tobe tobo tobt toee toek toer toet tojo toke toko took toor toot tore tork toro torr tort tote toto totr tott tre- tree trek treo tret troe troo trot trte trtr ttbb tteo tter ttoe tttt

-tree b-r-k bbbee bbook be-er be-ro bebek beber bebot beebe beeke beete bejte beker bekke bekko bekok beote berbe berek beret berk- berke berko berob beroe berok beror berre berte berto betee beter betke betoo betor betre bett- bette betto bjork bo-bo bobek bobet bobko bobok bobr bobre boeke boekt boero bojer bokeo boker boket bokko bokok bokor booer booke booko boore boort borbo boree borek borer boret borje borko boro- borok boroo borot borre borro botet botok botro botte breek breer breet brejo breke breo- brere breto brett brobo broek broer broje broke brook broto brrrr btr-t ebber ebbet ebeko ebert ebook eeeee ekeko ekker ektor eorre erbbe erber erere erkko eroor erore eroto error erte erter eteke etete etoko etoro etree etrek etter jebet jeerk jeker jeroo jerre jerte jetee jeter jette jetto jobbe joe-e jokee joker jokke jooto joree jotto jtekt k-jee k-rob k-t-b kebbe kebek keber kebob keere kejok kerek keret kerre ketek keter keto- kette ketto ko-ko kobee kober koker koket kokko kokor kokot kokre korbe korbo korek korke koror korro korte kotor kotto kre-o kreek kreke kreo- krete kroje kroke kroot krtok o-r-b obbet obejo obert obete objet oboro obote obreb obrok oerje okeke okere oketo okjeo okker okobo okoro oo-er ooooo orbot