cccc cccf ccee ccfc ccff ccgc ccoc ccrc ccre ccrf ccrg cec- cece ceco ceec cef- cefc cege cego ceke ceor cer- cerc cere cerf cero cfcf cfco cffr cfgo cfor cfre cfrg cgcc cgcg cger cgfc cgro ckck ckco cker ckfr ckgo ckoc ckoo ckor ckrc coce cock coco cofc cofe coff cogo cok- coke coko coof cook cor- corc core corf corg cork coro corr crcc crce crcr cre- crec cree creg creo crfc crkc croc croe crok croo cror eccc ecce ecco ecef ecfc ecfr ecko eco- ecog ecrc ecrf ecrr eeee eefe eeke eeoc eerc eerg eero ef-g efco efeo efke efor egcc egcg egcr egec egee eger egfr egge eggo ego- egor egre ekco ekek eker ekfc eore ercc erce erec erer erfc erg- ergg ergo erke eroc eroe eroo errc erre erro f--k fccf fece feck feek feer fefc fefe feff fefo fege fegg feke feko feof ferc fere ferk fero ferr ffcc ffee ffff ffrr foce fock foco foer fofo foge fogg fogo foke foof fook for- fore forg fork foro forr frcc free freo frfc froe frog gc-c gccc gccf gcfc gcrg gece geck geek geer gefe gege gegg gego geko geo- geof geog gere gero gfcf gfer gfor ggfg gggg goce gocr goef goer gofe goff gofr gogo goke goof goog gook goor gore gorf gorg goro gorr grcc grce grec gree gref greg groc grof grog grok groo gror grrr kccc kcck kccr kcec kcee kceg kceo kcfc kcfg kcfo kcgc kcgf kcgr kckc kckf kckk kcko kckr kcoe kcof kcog kcor kcrc kcrg kcro kcrr kecg keck keco kecr keef keek keer kefc keff kefr kege kegg kegk kegr kekc keke keko keok ker- kerc kere kerf kerk kero kerr kfcf kfco kfcr kfeg kfer kfff kffg kffk kfge kfgo kfgr kfog kfok kfoo kfor kfrc kfre kfrg kfro kfrr kgcc kgce kgcr kgec kgeo kgff kgfk kggf kggg kggo kggr kgoe kgor kgrc kgre kgrg kgrk kgro kgrr kkck kkco kkcr kkeg kkfg kkfr kkgo kkgr kkkk kkoo kkor kkrc kkre kkrf kkrk kkro kkrr kocf kock kofc kofe koff kofg kofk kofo koge kogg kogo kokc koke kokf kokk koko kokr kooc koog kook kooo koor korc kore korf korg kork koro korr krcc krce krcg krco krec kree kref krek kreo krfc krfe krff krfg krfo krkc krke krkk krko krkr kroc kroe krof krog krok kroo kror krrc krre krrf krrg krrk krro krrr o-eo occc oce ocee ocef ocke ocre ocro ocrr oec- oecc oeec oere ofcr ofek ofer off- offc offe offo offr ofgo ofor ofre ogee oger ogfr ogge ogog ogre ogro oker okgo okko okok okor okre okro oocr ooer ooff oooo oore orce orco ore- orec oreg orek oreo orer orfe orff orge orgo orke orko oro- oroe orof orok oror orro rccc rcfc rcgc rcrg recc rece reck recr reef reek refe reff refg refr rege rego regr reke reko reof reog rere rerg rero rfef rffc rkkf rocc roce rock roco roeg roer rofc rofe roff rofo roge rogg rogo roke rokk roko rokr roof roog rook roor rorc rore rork roro rrfc rrrr