-er bbb bbd bbe bbk bbo bbr bbt bdb bdd bde bdk bdo bdr bdt be- beb bed bee bek beo ber bet bkb bke bkk bko bkr bkt bob bod boe bok boo bor bot brb brd bre brk bro brr brt btb btd bte btk bto btr btt dbb dbd dbe dbk dbo dbr dbt ddb ddd dde ddk ddo ddr ddt de- deb ded dee dek deo der det dkb dke dkk dko dkr dkt dob dod doe dok doo dor dot drb drd dre drk dro drr drt dtb dtd dte dtk dto dtr dtt ebb ebd ebe ebk ebo ebr ebt ed- edb edd ede edk edo edr edt eeb eed eee eek eeo eer eet ekb ekd eke eko ekr ekt eo- eob eod eoe eok eoo eor eot erb erd ere erk ero err ert etb etd ete etk eto etr ett k-t kbb kbd kbe kbk kbo kbr kdb kde kdk kdo kdr kdt ke- keb ked kee kek keo ker ket kkb kke kkk kkr kkt kob kod koe kok koo kor kot krd krk kro krr krt ktb kte ktk kto ktr ktt ob- obb obd obe obk obo obr obt odb odd ode odo odr odt oeb oed oee oeo oer oet okb okd oke okk oko okr oo- oob ood ook ooo oor oot or- orb ord ore ork oro orr ort ot- otb otd ote otk oto otr ott rbb rbd rbe rbk rbo rbr rbt rdb rdd rde rdo rdr rdt re- reb red ree rek reo rer ret rkb rke rkk rko rkt rob rod roe rok roo ror rot rrb rrd rrk rrr rrt rtb rtd rte rtk rto rtr rtt tbb tbd tbe tbk tbo tbr tbt tdb tdd tde tdk tdo tdr tdt te- teb ted tee tek teo ter tet tkb tke tkk tko tkr tkt to- tob tod toe tok too tor tot trb trd tre trk tro trr trt ttb ttd tte ttk tto ttr ttt

bbbb bbdd bbdo bbeb bbet bd-r bebb bebe bebo bede bedo beeb beed beek beer beet beke beko beo- beod beok beor beot berd bere berk bero berr bert bete beto bett bobb bobe bobo bodb bode bodo boee boeo boer boet boke boko boob bood booe book boor boot bor- bord bore bork boro borr bort botb botd bote boto bott brdo brdt breb bred bree brek breo brer bret brkb brob brod broe brok broo bror brot brrr btdt btek btob btor btrt bttb d-bo dbtt dddd ddot ddre debe debt dedd dede dedo deeb deed deek deer deet dek- deke deor der- derb dere derk dero derr dete detk deto detr dobb dobe dod- dodd dode dodo doek doer doke doko doob dood dook door doot dord dore dork doro dorr dort dotd dote dotk doto dott dred dree drek dret drob drod drot dted dtek dtor dtot ebbo ebbr ebed eber eboe eboo ebor ebro edde eddo ede- eder edod eede eeee eeke eero eete ekeb eked ekek eker eket eode eore eotd eoto erbb erbe erde ereb ered erer eret erke erob erod eroe eroo erre erro etbr etee eter etoe etok etre etro ette etto kbbb kbbd kbbe kbbk kbbo kbbr kbbt kbdb kbde kbdo kbdr kbeb kbed kbee kbek kbeo kber kbet kbkb kbkk kbko kbkr kbob kbod kboe kbok kboo kbot kbrb kbrd kbre kbrk kbro kbrt kbtb kbte kbtk kbto kbtr kbtt kdbb kdbr kddb kddd kddk kddr kdeb kdet kdkb kdkd kdkk kdko kdkr kdkt kdoe kdok kdot kdrb kdro kdtd kdtr kebb kebe kebr kebt kedb kedd kede kedo kedr kedt keed keek keer keet kekb keke keko keok ker- kerb kere kerk kero kerr kert ket- ketd kete ketk keto ketr kett kkbb kkbd kkbe kkbo kkbr kkbt kkdd kkdo kkdt kked kkkk kkob kkoo kkor kkot kkrb kkre kkrk kkro kkrr kkrt kktk kobb kobe kobk kobo kobr kode kodk kodo kodt koed kokb koke kokk koko kokr koob kook kooo koor koot korb kord kore kork koro korr kort kotb kotd kote kotk koto kotr kott krbb krbd krbe krbk krbr krbt krdd krde krdo krdr kreb kred kree krek kreo kret krkd krke krkk krko krkr krob krod kroe krok kroo kror krrb krre krrk krro krrr krrt krtk krto krtr ktbb ktbr ktbt ktdb ktdd ktde ktdk ktdo ktdr kted ktee ktek 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 obdt obed ober obet obkb oboe obok obor obot obre obro obtd odbo oddd oded odeo oder odet odoo odor odot oedo oere oked oker oket okko okok okor okot okre okro okto oobe ooer oooo oord oore oort ootb orbb orbe orbo orde ordo ore- oreb ored orek oreo orer orke orko oro- oroe orok oror orot orro orte orto otbd oted otee oter oto- otoe otok otoo otor otre otro otte otto rbbb rbbr rder rebb rebe rebk rebo redd rede redo redr reeb reed reek reet reke reko rekt reod reot rerd rere rero rert retd rete reto retr rett rob- robb robe robo robt rodd rode rodo roed roer roet roke rokk roko rokr roob rood rook roor root rore rork roro rort rote rotk roto rotr rott rred rrrr rtdt rtee tbrb tddb tdkr tdor tebo tedd tede tedk teed teek teer teet teke teok teor ter- tere terk tero terr tete teto tetr tett tkod tobe tobo tobt todd tode todo todt toed toee toek toer toet toke toko tood took toor toot tord tore tork toro torr tort totd tote toto totr tott tre- tred tree trek treo tret trod troe troo trot trte trtr ttbb tteo tter ttoe tttt

-tree b-e-d b-r-k bbbee bbook bd-re bdoor bdort be-er be-ro bebdo bebed bebek beber bebod bebot bedde bedee beder bedet bedok bedot beebe beede beeke beerd beete beker bekke bekko bekok beode beord beote