-er bbb bbd bbe bbo bbr bbt bbx bdb bdd bde bdo bdr bdt bdx be- beb bed bee beo ber bet bex bob bod boe boo bor bot box brb brd bre bro brr brt brx btb btd bte bto btr btt btx bxb bxd bxo bxx dbb dbd dbe dbo dbr dbt dbx ddb ddd dde ddo ddr ddt ddx de- deb ded dee deo der det dex dob dod doe doo dor dot dox drb drd dre dro drr drt drx dtb dtd dte dto dtr dtt dtx dxd dxo dxr dxt dxx ebb ebd ebe ebo ebr ebt ebx ed- edb edd ede edo edr edt edx eeb eed eee eeo eer eet eex eo- eob eod eoe eoo eor eot erb erd ere ero err ert etb etd ete eto etr ett etx ex- exd exe exo exr ext exx ob- obb obd obe obo obr obt obx odb odd ode odo odr odt oeb oed oee oeo oer oet oex oo- oob ood ooo oor oot oox or- orb ord ore oro orr ort orx ot- otb otd ote oto otr ott ox- oxb oxo oxt oxx rbb rbd rbe rbo rbr rbt rbx rdb rdd rde rdo rdr rdt rdx re- reb red ree reo rer ret rex rob rod roe roo ror rot rox rrb rrd rrr rrt rtb rtd rte rto rtr rtt rtx rxr t-x tbb tbd tbe tbo tbr tbt tdb tdd tde tdo tdr tdt tdx te- teb ted tee teo ter tet tex to- tob tod toe too tor tot tox trb trd tre tro trr trt trx ttb ttd tte tto ttr ttt ttx txe txt xbe xbr xbx xdb xde xdr xdt xed xee xer xet xex xod xoo xor xot xox xrd xrt xrx xtr xtx xxo xxx

bbbb bbdd bbdo bbeb bbet bbox bd-r bebb bebe bebo bede bedo beeb beed beer beet beo- beod beor beot berd bere bero berr bert bete beto bett bobb bobe bobo bodb bode bodo boee boeo boer boet boob bood booe boor boot boox bor- bord bore boro borr bort botb botd bote boto bott brdo brdt breb bred bree breo brer bret brex brob brod broe broo bror brot brox brrr btdt btex btob btor btrt bttb d-bo dbtt dddd ddot ddre debe debt dedd dede dedo deeb deed deer deet deor der- derb dere dero derr dete deto detr dex- dexe dext do-x dobb dobe dod- dodd dode dodo doer doob dood door doot dord dore doro dorr dort dotd dote doto dott dred dree dret drob drod drot dted dtor dtot dtox dttx dtxt dxbe dxbr dxbt dxdr dxed dxrd dxre dxrr dxrt dxrx dxxr dxxx ebbo ebbr ebed eber eboe eboo ebor ebox ebro edde eddo ede- eder edex edod eede eeee eero eete eext eode eore eotd eoto er-x erbb erbe erde ereb ered erer eret erob erod eroe eroo erre erro etbr etee eter etoe etox etre etro ette etto exed exer exo- exod exor exrx exte extr o-eo obbo obdt obed ober obet obex oboe obor obot obox obre obro obtd odbo oddd oded odeo oder odet odex odoo odor odot oedo oere oobe ooer oooo oord oore oort ootb orbb orbe orbo orde ordo ore- oreb ored oreo orer orex oro- oroe oror orot orro orte orto otbd oted otee oter oto- otoe otoo otor otre otro otte otto oxer oxo- oxox oxxo rbbb rbbr rder rebb rebe rebo redd rede redo redr redx reeb reed reet reod reot rerd rere rero rert retd rete reto retr rett rexx rob- robb robe robo robt rodd rode rodo roed roer roet roob rood roor root roox rore roro rort rote roto rotr rott roxo rred rrrr rtdt rtee rtex tbox tbrb tddb tdor tebo tedd tede tedx teed teer teet teor ter- tere tero terr tete teto tetr tett tetx text tobe tobo tobt todd tode todo todt toed toee toer toet tood toor toot tord tore toro torr tort torx totd tote toto totr tott tox- toxo toxt tre- tred tree treo tret trex trod troe troo trot trox trte trtr ttbb tteo tter ttoe tttt txtr x-ed xbee xbox xeer xer- xero xert xexe xoro xote xoxo xrdb xrod xtro xxxo xxxx

-tree b-e-d bbbee bd-re bdoor bdort be-er be-ro bebdo bebed beber bebod bebot bebox bedde bedee beder bedet bedot beebe beede beerd beete beode beord beote berbe berde bered beret berob beroe beror berre berte berto betee beter betoo betor betre bett- bette betto bo-bo bobet bobr bobre bodd- boded boder bodoe bodor boedo boero boode booed booer boord boore boort bootx borbo borde bordo bored boree borer boret borex boro- borod boroo borot borox borre borro botet botox botro botte boxbe boxed boxee boxer bre-x bredd brede bredt breed breer breet breo- brerd brere breto brett bretx brobo brodd brode brodo broer brood broto brrrr btr-d btr-t d-box d-dot d-rod d-tox ddddd ddebo debed deber debet debot debro debte dedde dedee deder deede deere deore deoro derbe derde dered dero- derob derre derro deter detoo detox detre dette do-do dobee dober dobox dobre dobro dodoo dodro doerr doodo doore doorx doote dordt dored doree doret dorot dorre dorte doted doter dotoo dotto doxed drbob drdre dredd drede dreed drere drobe drobo drode drood drote drott dxdxd e-box e-dee e-otd ebbed ebber ebbet ebert edder eddoe eddre edeo- edere edoor edott edred eeeee eerde eorre erbbe erber erdor erdre erede erere erode erodr eroor erore eroto erred error erte erter etete etext etoro etree etter exede exert exode exorb exord exore exort exred exter extre extro o-r-b obbet obedt obert obete obodo oboro obote obreb odder odebo odeto odore oo-er ooooo orbed orbot order ordet ordre ordro oredo oreed oreo- orere orero orexo orobe orobo orodo oroer orret orter ortet ortoo otere otero ototo otter oxdeb oxted oxter rebbe reber rebet rebox redbd redde reder redex redor redot redox reede reere reord reorx rerde rere-