cccc cccf ccci ccee ccfc ccff ccfi ccic ccii ccix ccoc ccxi cec- cece ceci ceco ceec cef- cefc cexe cfcf cfco cfix cfox cicc cici cico ciee cife ciff ciii cixi coce coco coex cofc cofe coff cofi coif coix coof coxe cxii cxix cxxi cxxx eccc ecce ecci ecco ecef ecfc eco- eeee eefe eeoc efco efeo effi efic eico eiec eiei exco exec exfo exif exo- fccf fcic fcii fece fefc fefe feff fefi fefo feie feio feof ffcc ffee ffff ffii ficc fice fico fiec fief fifc fife fiff fifi fifo fiii fioe fixe fixx foce foci foco fofo foie foix foof foxe foxx iccc iccf icci icco icec icee icef icex icoc iecc ieie ieio ifco ifex ific iiie iiii iiio iioi iioo ioci ioee iofc ioii ioio ioof iooi iooo ixxi o-eo occc occi oce ocee ocef oec- oecc oeec off- offc offe offo oici oiii ooff oooo oxi- oxic oxie oxo- oxof oxox oxxo x-fi xcii xefe xexe xfce xico xiii xixi xoco xoxo xxii xxix xxxi xxxo xxxx