-er ddd dde ddf ddo ddq ddr ddt ddu de- ded dee def deo deq der det deu dfd dfe dff dfo dfq dfr dft dfu dod doe dof doo doq dor dot dou dqe drd dre dro drq drr drt dru dtd dte dtf dto dtr dtt dtu dud due duf duo dur dut ed- edd ede edf edo edr edt edu eed eee eef eeo eer eet ef- efd efe eff efo efr eft eo- eod eoe eof eoo eoq eor eot eou eqe eqf eqq eqt equ erd ere erf ero erq err ert eru etd ete etf eto etr ett etu eu- eud eue euf eur eut fdd fde fdf fdo fdr fdt fdu fed fee fef feo fer fet feu ffd ffe fff ffo ffr fft ffu foe fof foo for fot fou fqt frd fre frf fro frq frr frt fru ftd fte ftf fto ftq ftr ftt ftu fud fue fuf fuo fur fut fuu odd ode odf odo odr odt odu oed oee oef oeo oer oet of- ofd ofe off ofo ofr oft ofu oo- ood oof ooo oor oot oqo or- ord ore orf oro orr ort oru ot- otd ote otf oto otr ott otu ou- oud oue ouf ouo our out qdr qdt qed qee qef qeo qet qfd qfe qff qft qof qoo qor qqq qqu qre qrt qru qtd qto qtq qtr qu- qud que quo qur qut rdd rde rdf rdo rdr rdt rdu re- red ree ref reo req rer ret reu rfd rfe rff rfo rfq rfr rft rfu rod roe rof roo ror rot rou rrd rrf rrq rrr rrt rru rtd rte rtf rto rtq rtr rtt rtu rud rue ruf ruo rur rut ruu tdd tde tdf tdo tdr tdt tdu te- ted tee tef teo teq ter tet teu tfd tfe tff tfo tfr tft tfu to- tod toe tof too toq tor tot tou tqo trd tre trf tro trq trr trt tru ttd tte ttf tto ttr ttt ttu tud tue tuf tuo tur tut tuu udd ude udf udo udr udt udu ued uee uef uer uet ufd ufe uff ufo ufr uft ufu uod uoe uoo uor uot ur- urd ure urf uro urr urt uru utd ute utf uto utr utt utu uue uur uut uuu

dddd ddot ddre dedd dede dedo dedu deed deef deer deet defe deff defo deft deor der- dere derf dero derr dete deto detr deue deur deut dfdt dfer dfoe dfrf dftr dod- dodd dode dodo doer doff dood doof door doot dord dore dorf doro dorr dort doru dotd dote doto dott doud doue douf dour dout dqed dred dree dref dret drod drof drot drou drue drut druu dted dtor dtot dudd dude dudo dudu duer duet duff dufu duo- duqu dure duro durt duru dute duur duut edde eddo ede- eder edfu edod edou edru edur eede eedu eeee eefe eero eete eetu efeo efet efor eft- eftu eode eore eotd eoto eqed equ- eque equo erde erdf ered erer eret erft erod eroe eroo erre erro ertu erur etee eter etfe etoe etre etro ette etto ettu eude euer eur- eure euro eurt fdot fede feed feer feet fefe feff fefo feod feof ferd fere fero ferr fert feru fete fetr fett fetu feud ffee ffff ffrr fftf fode foed foer fofo food foof foot for- ford fore foro forr fort fote foto fott foud four fout fred free freo freq fret froe frot frou frue fter fudd fude fuet fuff fufu fuor fur- fure furo furr furt fute futo futu o-eo oddd oded odeo oder odet odoo odor odot odou odtu odur oedo oere oeuf ofdr ofeq ofer off- offe offo offr offu ofor ofre ooer ooff oooo oord oore oort oque orde ordo ordu ore- ored oreo orer orfe orff orfu oro- oroe orof oror orot orro orte orto oted otee oter oto- otoe otof otoo otor otre otro otte otto ottu otur oude oued ouer oufe ouff our- oure ouro ourt out- oute outo outq ouu- qdro qere qero qerq qfet qore qotd qqqq qued quee quer quet quft qufu quod quor quot qurd quro qute quu- rder redd rede redo redq redr redu reed reef reet refd refe reff refr reft refu reod reof reot reou reqd rerd rere rero rert reru retd rete reto retr rett reue reuf reut reuu rfef rodd rode rodo roed roer roet rofe roff rofo rood roof roor root rore roro rort roru rote roto rotr rott roud roue rouf rout rred rrrr rtdt rtee rudd rude rudo rued ruer ruet rufe ruff rufo ruft rurd rure ruro ruru rute ruto rutt rutu ruud tdff tdor tedd tede teed teef teer teet teff teft teor ter- tere terf tero terr teru tete teto tetr tett tetu teut tfot todd tode todo todt todu toed toee toer toet toff tofo toft tofu tood toof toor toot tord tore torf toro torq torr tort toru totd tote toto totr tott tour tout tre- tred tree tref treo tret treu trfd trfr trod troe troo trot trou trte trtr trud true trut truu tteo tter ttff ttoe tttt tude tudu tuer tuet tufe tuff tufo tuft tufu tuor turd ture turf turo turr turt turu tute tuto tutt tutu tuuo uder udet udoo udot ufer uffe uofo uor- uore urde urdu ure- ured uret urfe urff urft uro- uroo urre urte uruq urur urut uter utfo utor utto uttu utuq uutf uuuu

-tree d-dot d-rod ddddd dedde dedee deder dedur dedut deede deefe deeff deere defed defeo defer defet deffe deffo defoe defot deore deoro deque derde dered dero- derre derro derue deter detoo detre dette detuo detur deure deut- deuto do-do dodoo dodro doerr dofor doodo doore doote doout dordt dored doree doret dorff dorot dorre dorte dorud doted doter dotoo dotto doude douer doufe doufu doure douro doute drdre dredd drede dreed dreff dreft dreof