-ene cccc cccf cccs ccee ccfc ccff ccnc ccne ccnf ccnr ccns ccrc ccre ccrf ccrs ccsf ccsn ccss cec- cece cecs ceec cees cef- cefc cefn cen- cene cens cer- cerc cere cerf cern cers cesc cese cesr cess cfcf cfcn cfcs cffr cfnr cfns cfre cfrn cfse cnes cnrc cnrr cnss crcc crce crcr cre- crec cree cren cres crfc crfs crne crns crss cscc csce cscf cscr cscs csec csee cser csfc csfr csne csrc csrs csse cssr eccc ecce ecef eces ecfc ecfr ecfs ecne ecrc ecrf ecrr ecsc ecse ecss eecs eeee eees eefe eefn eens eerc eers eese efen efes effs ence encs enee ener enes ennc enne enns enrs ense ercc erce erec eren erer eres erfc erfs erne erns errc erre errs erse esce escr escs esee esen eser eses esfs esne esse fccf fces fcsc fece feen feer fees fefc fefe feff fene fenn fens ferc fere fern ferr fers fese fess ffcc ffee ffff ffrr ffss fnrs frcc frcn free fren fres frfc frns frsc fscc fsec fssc fssf nccc nccf nccn nccr nccs ncec ncee ncef ncen ncer nces ncfc ncfe ncnc ncrc ncre ncsc ncse ncsf ncss necc nece necr necs neef neen neer nees nefe neff nefs nene nens nerc nere nerf nerr ners nesc nese nesn nesr ness nfer nfff nfrs nfsr nnes nnnn nnss nrcs nren nrfc nrrc nrsc nscc nscs nsec nser nsfc nsfs nsnr nsrc nssc nsse nssf nssr nsss rccc rccs rcfc rcnr rcsc rcss recc rece recr recs reef reen rees refe reff refn refr refs rene renn rens rere rers rese resn ress rfef rffc rncs rrfc rrrr rscc rscn rscs rsee rsfc rsnn rsnr rsre sccc scce sccs scec scee scer scfc scfe scnr scr- scrc scre scrn scrs scsc scsn scsr se-c se-e se-f se-n se-s sec- secc sece secn secr secs seec seef seen seer sees seff sene senn senr sens serc sere serf sern serr sers sesc sese sess sfcc sfcs sfer sffc sfne sfrc sfss sncc sncf snee sner snes snns snrs srcc srec sres srfc srnn sscc ssce sscs ssec ssee sses ssfc ssns ssrc ssrs sssc sssf ssss