cccc ccci cccs ccee ccic ccii ccir ccis ccix ccrc ccre ccri ccrs ccsi ccss ccxi cec- cece ceci cecs ceec cees cer- cerc cere ceri cers cesc cese cesi cesr cess cexe cicc cici cicr cics ciee cier cies ciii ciis circ cire ciri cirr cirs cis- cisc cise cisr ciss cixi crcc crce crcr cre- crec cree crei cres crex cric crie cris crss cscc csce csci cscr cscs csec csee cser csir csis csix csrc csrs csse cssr cxii cxix cxxi cxxx eccc ecce ecci eces ecis ecrc ecri ecrr ecsc ecse ecss eecs eeee eees eerc eers eese eesi eics eiec eiei eier eies eire eirs eise eiss er-x ercc erce erec erei erer eres eric erie eris errc erre errs erse ersi esce esci escr escs esee eser eses esie esis esri esse essi exec exer exes exis exrx iccc icci iccr iccs icec icee icer ices icex icis icrc icre icrr icrs icsc icse icsi icsr icss iecc ieie iere ieri iers iesc iesi iesr iies iiie iiii iiis iirc iirs iisc iisi iisr ircc ircs ircx iree irer ires irex iri- iric irie iris irix irrc irre irri irrs irse iscc isci iscr iscs isec isee iser ises isic isie isis isri issc isse issi issr isss ixxi rccc rccs rcic rcis rcsc rcsi rcss recc rece reci recr recs rees reii reir reis rere reri rers rese resi ress rexx ricc rice rics rier ries riex riis rire riri rirs risc rise risi riss rixc rixe rrrr rscc rscs rsee rsis rsre rxes s-ic s-ii sccc scce sccs scec scee scer sci- scic scie scir scis scr- scrc scre scri scrs scsc scsi scsr se-c se-e se-i se-s se-x sec- secc sece secr secs seec seer sees seex seie seii seir seis seix serc sere seri serr sers sesc sese sesi sess sex- sexe sexi sicc sice sici sics siec sier sies siex sirc sire siri sirr sirs sisc sise sisi siss sixe sixx srcc srec sres sris sscc ssce ssci sscs ssec ssee sses ssex ssis ssrc ssri ssrs sssc sssi ssss xces xcii xcis xcri xeer xer- xers xexe xics xiii xisi xixi xxii xxix xxxi xxxx