c-cd cccc ccdc ccdr cced ccee ccoc ccod ccrc ccre ccrt cctc cctt cd-e cd-r cddr cdec cder cdot cdre cec- cece ceco cect cedd cede cedo cedt ceec ceor cer- cerc cerd cere cero cert cet- cete ceto coce coco coct codd code coed cood coot cor- corc cord core coro corr cort cotc cote coto cott crcc crce crcr crdc cre- crec cred cree creo cret croc crod croe croo cror crot crrt crtc ctec ctor ctot ctrc dccc dcct dctc dddd ddoc ddot ddrc ddre dec- decc decd dece deco dect dedd dede dedo deed deer deet deor der- derc dere dero derr dete deto detr doce doco doct dod- dodd dode dodo doer dood door doot dorc dord dore doro dorr dort dotd dote doto dott dred dree dret drod drot dtcc dted dtor dtot eccc ecce ecco ecct ecdc eced eco- ecod ecot ecrc ecrr ect- ectc ecto eddc edde eddo ede- eder edoc edod eede eeee eeoc eerc eero eetc eete eocd eode eore eotc eotd eoto ercc erce erde erec ered erer eret eroc erod eroe eroo errc erre erro etcc etco etec etee eter etoe etre etro ette etto o-eo occc occt oce oced ocee ocet ocre ocro ocrr oct- octe octo oddd oded odeo oder odet odoo odor odot oec- oecc oedo oeec oere oocr ooer oooo oord oore oort orce orco orde ordo 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 rccc rcdc rcde rcet rcrd rctc rder rdoc recc recd rece recr rect redc redd rede redo redr reed reet reod reot rerd rere rero rert retd rete reto retr rett rocc roce roco rodd rode rodo roed roer roet rood roor root rorc rore roro rort rotc rote roto rotr rott rred rrrr rtcc rtce rtdt rtee tccc tcdd tctc tdor teco tecr tect tedd tede teec teed teer teet teor ter- terc tere tero terr tete teto tetr tett toce toco todd tode todo todt toed toee toer toet tood toor toot torc tord tore toro torr tort totc totd tote toto totr tott trcc tre- trec tred tree treo tret troc trod troe troo trot trtc trte trtr tteo tter ttoe tttt