-er c-- ccc ccd cce cco ccr cct ccu cdc cdd cde cdo cdr cdt cdu ce- cec ced cee ceo cer cet ceu co- coc cod coe coo cor cot cou crc crd cre cro crr crt cru ctc ctd cte cto ctr ctt ctu cuc cud cue cuo cur cut cuu dcc dcd dce dco dcr dct dcu ddc ddd dde ddo ddr ddt ddu de- dec ded dee deo der det deu doc dod doe doo dor dot dou drc drd dre dro drr drt dru dtc dtd dte dto dtr dtt dtu duc dud due duo dur dut ec- ecc ecd ece eco ecr ect ecu ed- edc edd ede edo edr edt edu eec eed eee eeo eer eet eo- eoc eod eoe eoo eor eot eou erc erd ere ero err ert eru etc etd ete eto etr ett etu eu- euc eud eue eur eut oc- occ ocd oco ocr oct ocu odc odd ode odo odr odt odu oec oed oee oeo oer oet oo- ooc ood ooo oor oot or- orc ord ore oro orr ort oru ot- otc otd ote oto otr ott otu ou- ouc oud oue ouo our out rcc rcd rce rco rcr rct rcu rdc rdd rde rdo rdr rdt rdu re- rec red ree reo rer ret reu roc rod roe roo ror rot rou rrc rrd rrr rrt rru rtc rtd rte rto rtr rtt rtu ruc rud rue ruo rur rut ruu tcc tcd tce tco tcr tct tcu tdc tdd tde tdo tdr tdt tdu te- tec ted tee teo ter tet teu to- toc tod toe too tor tot tou trc trd tre tro trr trt tru ttc ttd tte tto ttr ttt ttu tuc tud tue tuo tur tut tuu ucc ucd uce uco ucr uct ucu udc udd ude udo udr udt udu uec ued uee uer uet uoc uod uoe uoo uor uot ur- urc urd ure uro urr urt uru utc utd ute uto utr utt utu uuc uue uur uut uuu

c-cd cccc cccu ccdc ccdr cced ccee ccoc ccod ccrc ccre ccrt cctc cctt ccuc ccut cd-e cd-r cddr cdec cder cdot cdre cec- cece ceco cect cedd cede cedo cedt cedu ceec ceor ceou cer- cerc cerd cere cero cert cet- cete ceto coce coco coct cocu codd code coed cood coot cor- corc cord core coro corr cort cotc cote coto cott cotu coud coue cour cout crcc crce crcr crdc cre- crec cred cree creo cret creu croc crod croe croo cror crot crrt crtc crud crue crut ctec ctor ctot ctrc cucc cuce cude cued cuer curd cure curo curr curt cut- cutc cute cuto cutt dccc dcct dccu dctc dddd ddoc ddot ddrc ddre dec- decc decd dece deco dect dedd dede dedo dedu deed deer deet deor der- derc dere dero derr dete deto detr deue deur deut doce doco doct docu dod- dodd dode dodo doer dood door doot dorc dord dore doro dorr dort doru dotd dote doto dott douc doud doue dour dout dred dree dret drod drot drou drue drut druu dtcc dted dtor dtot duce duco duct dudd dude dudo dudu duer duet duo- dure duro durt duru dute duur duut eccc ecce ecco ecct ecdc eced eco- ecod ecot ecou ecrc ecrr ecru ect- ectc ecto eddc edde eddo ede- eder edoc edod edou edru educ edur eede eedu eeee eeoc eerc eero eetc eete eetu eocd eode eore eotc eotd eoto ercc erce erde erec ered erer eret eroc erod eroe eroo errc erre erro ertu eruc erur etcc etco etec etee eter etoe etre etro ette etto ettu eucd eude euer eur- eurc eure euro eurt o-eo occc occt oce oced ocee ocet ocre ocro ocrr oct- octe octo ocur oddd oded odeo oder odet odoo odor odot odou odtu odur oec- oecc oedo oeec oere oocr ooer oooo oord oore oort orce orco orde ordo ordu ore- orec ored oreo orer oro- oroe oror orot orro ortc orte orto otcd oted otee oter oto- otoe otoo otor otre otro otte otto ottu otur oucc oudc oude oued ouer our- oure ouro ourt out- oute outo ouu- rccc rcdc rcde rcet rcrd rctc rder rdoc recc recd rece recr rect recu redc redd rede redo redr redu reed reet reod reot reou rerd rere rero rert reru retd rete reto retr rett reue reut reuu rocc roce roco rodd rode rodo roed roer roet rood roor root rorc rore roro rort roru rotc rote roto rotr rott roud roue rout rred rrrr rtcc rtce rtdt rtee ruce ruct rudd rude rudo rued ruer ruet rurc rurd rure ruro ruru rute ruto rutt rutu ruud tccc tccu tcdd tctc tdor teco tecr tect tedd tede teec teed teer teet teor ter- terc tere tero terr teru tete teto tetr tett tetu teut toce toco todd tode todo todt todu toed toee toer toet tood toor toot torc tord tore toro torr tort toru totc totd tote toto totr tott tour tout trcc tre- trec tred tree treo tret treu troc trod troe troo trot trou trtc trte trtr truc trud true trut truu tteo tter ttoe tttt tucc tuco tude tudu tuer tuet tuor turc turd ture turo turr turt turu tute tuto tutt tutu tuuo ucdc ucdd ucrc ucut uder udet udoo udot uocc uor- uore urde urdu ure- ured uret uro- uroo urre urte urur urut utec uter utor utto uttu uuoc uuuu

-tree c-cor c-dot c-tec ccccc ccett cduce ceco- ceddo ceded ceder cedor cedr- cedre cedro ceede ceedo ceere ceoce ceoor cerc- cerce cerco cerdo cerec cered cerer ceret cero- ceroc cerou cerre cerro certe ceto- cette co-co co-ed cocc- cocce cocco coceo cocto cocur codco codde codec coded coder codo codru coete coeur coode cooed cooee cooer coord coore coote corce corde core- cored coree corer coreu coro- corod corot corre corte corto coted coter cott- cotte