c-cd cccc ccci ccdc ccdi ccdr cced ccee ccic ccid ccii ccir ccix ccrc ccre ccri ccxi cd-e cd-r cddr cdec cder cdex cdic cdii cdre cdxi cec- cece ceci cedd cede cedi ceec ceke cer- cerc cerd cere ceri cexe cicc cici cicr cidc cide cidi cidr ciee cier ciid ciii cikr circ cire ciri cirk cirr cixi ckck ckcx cker ckrc ckrd crcc crce crcr crdc cre- crec cred cree crei crex cric crie crik crkc cxii cxix cxxi cxxx d-ix dccc dcci dcii dcix dcrk dcxi dcxx dddd ddie ddrc ddre dec- decc decd dece deci deck dedd dede dedi deed deek deer deid deie deir dek- deke der- derc dere deri derk derr dex- dexe dice dici dick dide didi died dier diex diii dike diki dird dire dirk dirr dixi dkdc dkid dred dree drei drek dric drie drix dxcc dxci dxck dxdc dxdr dxec dxed dxii dxix dxkr dxkx dxrd dxre dxrk dxrr dxrx dxxr dxxx eccc ecce ecci ecdc eced ecrc ecri ecrr eddc edde eddi ede- edei eder edex edie edik eede eeee eeke eerc eick eid- eide eidi eidr eiec eied eiei eier eike eiki eird eire eked ekek eker ekki er-x ercc erce erde erdi erec ered erei erer eric erie erik erke erki errc erre exec exed exer exid exki exrx iccc icci iccr icdc icdd icde icec iced icee icer icex icke icrc icre icrr idce idcr idec ided idee ider idex idic idid idie idir idrc idre iecc iedr ieie iere ieri iicd iide iied iiie iiii iirc ikee iker ikid ikki ikri ircc ircd ircx irdc ired iree irer irex iri- iric irid irie irix irki irrc irre irri ixxi k-ci k-id kc-x kccc kccd kcci kcck kccr kcdc kcdd kcdi kcdr kcdx kcec kced kcee kcei kcic kcid kcie kcii kcir kcix kckc kckk kckr kckx kcrc kcri kcrr kcrx kcxr kdcc kdcd kdce kdcr kddc kddd kddi kddk kddr kddx kdec kdei kdex kdic kdix kdkd kdkk kdkr kdri kdrx kdxe kdxx keck kecr kedc kedd kede kedi kedr keed keek keer keid keii keik keir kekc keke keki ker- kerc kere keri kerk kerr kerx kexi kexx kicc kicd kice kick kicr kicx kidd kide kidi kidk kidr kidx kier kiic kiid kiii kiik kiix kikc kikd kiki kikk kikr kikx kirc kiri kirk kirr kirx kixi kixk kixx kkcd kkci kkck kkcr kkdc kkdd kked kkex kkic kkid kkik kkix kkkk kkrc kkre kkrk kkrr kkrx kkxk kkxx krcc krcd krce krci krdc krdd krde krdr krdx krec kred kree krei krek krex krid krik krkc krkd krke krki krkk krkr krkx krrc krre krri krrk krrr krrx krxk krxr krxx kxci kxdc kxdd kxdi kxdr kxed kxex kxic kxii kxix kxkc kxkk kxkx kxrc kxre kxrk kxrr kxrx kxxe kxxi kxxk kxxr kxxx rccc rcdc rcde rcic rcid rcrd rder recc recd rece reci reck recr redc redd rede redi redr redx reed reek reid reii reik reir reke reki rerd rere reri rexx ricc rice rick ridc ridd ride ridi ridx ried riek rier riex rike riki rikk rire riri rixc rixe rred rrrr x-ed xcii xcri xdcc xeer xer- xexe xidi xiii xixi xkcd xrcd xxii xxix xxxi xxxx