-er bbb bbe bbi bbk bbl bbr bbt be- beb bee bei bek bel ber bet bi- bib bie bii bik bil bir bit bkb bke bkk bkl bkr bkt blb ble bli blk bll blr blt brb bre bri brk brl brr brt btb bte bti btk btl btr btt ebb ebe ebi ebk ebl ebr ebt eeb eee eek eel eer eet eib eie eii eik eil eir eit ekb eke eki ekl ekr ekt elb ele eli elk ell elr elt erb ere eri erk erl err ert etb ete eti etk etl etr ett ibb ibe ibi ibk ibl ibr ibt ie- iee iei iek iel ier iet iib iie iii iil iir iit ikb ike iki ikk ikl ikr ikt il- ilb ile ili ilk ill ilr ilt ir- irb ire iri irk irl irr irt itb ite iti itk itl itt k-t kbb kbe kbi kbk kbl kbr ke- keb kee kei kek kel ker ket kib kie kii kik kil kir kit kkb kke kki kkk kkl kkr kkt kl- klb kli klr klt kri krk krl krr krt ktb kte ktk ktl ktr ktt lbb lbe lbi lbk lbl lbr lbt leb lee lei lek lel ler let lib lie lii lik lil lir lit lkb lkl lkr lkt llb lle lli llk lll llr llt lrb lri lrk lrr lrt ltb lte lti ltk ltl ltr ltt rbb rbe rbi rbk rbl rbr rbt re- reb ree rei rek rel rer ret rib rie rii rik ril rir rit rkb rke rkk rkt rle rli rll rlr rlt rrb rri rrk rrl rrr rrt rtb rte rti rtk rtl rtr rtt tbb tbe tbi tbk tbl tbr tbt te- teb tee tei tek tel ter tet tib tie tii tik til tir tit tkb tke tkk tkl tkr tkt tle tli tlk tll tlr tlt trb tre tri trk trl trr trt ttb tte tti ttk ttl ttr ttt

bbbb bbeb bbet bblb bebb bebe bebi beeb beek beel beer beet beik beil beir beit beke beki bele beli belk bell belt bere beri berk berr bert bete beti bett bibb bibe bibi bibl bieb biel bier biet bike bile bili bilk bill bilt birb bire biri birk birl birr birt bite bitt blbt bleb blee blei blek blet blik blir blit blkb breb bree brei brek brel brer bret brie brik bril brit brkb brrr btek btie btrt bttb ebbr ebel eber ebit ebli eeee eeke eele eete eiei eier eike eiki eile eire eitb eiti eitr ekeb ekek eker eket ekki el-b elbe elbi elee elek eler elet elie elik elil elit elke elki elle elli elte erbb erbe ereb erei erel erer eret erie erik eril erit erke erki erle erli erll erre ertl etbr etee etel eter etik etre ette etti i-be ibet ibie ible ibri ibtb ibtl ieet ieie iele iere ieri iett iiie iiii iiit iitr iitt ikee iker ikki ikri ile- ilek iler ilet ilie ilir ilit ilke ilki ill- ille illi illt ilre irbe iree irel irer iri- irie iril irki irlb irre irri irte irti itbe itek itel iter itet itie itil itll itri kbbb kbbe kbbi kbbk kbbl kbbr kbbt kbeb kbee kbek kbel kber kbet kbib kbie kbik kbil kbit kbkb kbkk kbkl kbkr kblb kble kbll kblr kblt kbrb kbre kbri kbrk kbrl kbrt kbtb kbte kbtk kbtl kbtr kbtt kebb kebe kebi kebr kebt keek keel keer keet keib keii keik keil keir kekb keke keki kekl kele keli kelk kell kelt ker- kerb kere keri kerk kerl kerr kert ket- kete keti ketk ketr kett kibb kibe kibi kibl kibr kibt kiel kier kiii kiik kiit kiki kikk kikr kikt kilb kile kili kilk kill kilr kilt kirb kiri kirk kirr kirt kite kiti kitl kitr kitt kkbb kkbe kkbi kkbl kkbr kkbt kkik kkit kkkk kklb kkli kkll kkrb kkre kkrk kkrl kkrr kkrt kktk kktl klbb klbe klbl klbt kleb klee klek kler klet klib klik klil klir klit klkk klkl klkr kllb klle kllk klrk klrr klti kltk kltr kltt krbb krbe krbi krbk krbl krbr krbt kreb kree krei krek kret krib krik kril krit krke krki krkk krkr krle krlt krrb krre krri krrk krrl krrr krrt krti krtk krtr ktbb ktbl ktbr ktbt ktee ktek ktel ktib ktie ktik ktil ktkb ktke ktkk ktkr ktkt ktlb ktli ktlk ktlr ktlt ktrb ktre ktri ktrk ktrl ktrr ktrt ktti kttk kttr kttt lblr lbrt leek leel leer leet leib leie leik leil leir leit leke leki lekk lele leli lell lere lerk lert lete leti lett libe libr lieb liek liel lier liet liii liir like lilb lile lili lill lilt lire liri lirk lirl lirr lirt litb lite liti litl litr litt llet llll lrrr ltbl ltee ltib ltke lttr rbbb rbbr rble rebb rebe rebk reeb reek reel reet reii reik reil reir reit reke reki rekt relb rele rell relt rere reri rert rete reti retr rett rib- ribe riek riel rier riet rike riki rikk rile rill rire riri rite riti ritl ritt rlee rrle rrrr rtee rtei rtle rtlt tbil tbit tbrb teek teel teer teet teie teil teir teke tel- tele teli tell telt ter- tere teri terk terr tete teti tetr tett tibi tie- tiee tiei tiel tier tiet tiit tike tiki tile till tilr tilt tirb tire tiri tirl tirr tite titi titt tlik tlli tre- tree trei trek tret tri- trib trie trik tril trit trte trtr ttbb tter tttt

-tree b-r-k bbbee be-er bebek bebel beber bebti beebe beeke beele beeli beeri beete beibi beier beire beite beker bekir bekke bekti belee belek belet belie belik belit belki bellb belle belli berbe berei berek berel beret berie beril berit berk- berke berle berli berre berri berte berti betee betel beter betie betke betle betre bett- bette betti bibbe bibel biber bibie bible bibri biebe bieke biele biere bieri biert bieti bikel biker