-ene cccc cccf cccp cccs ccee ccfc ccff ccnc ccne ccnf ccnp ccnr ccns ccpe ccpn ccpp ccpr ccps ccrc ccre ccrf ccrp ccrs ccsf ccsn ccsp ccss cec- cece cecp cecs ceec cees cef- cefc cefn cen- cene cens cepc cepe cepp cepr ceps cer- cerc cere cerf cern cerp cers cesc cese cesp cesr cess cfcf cfcn cfcs cffr cfnr cfns cfpr cfps cfre cfrn cfrp cfse cncp cnep cnes cnrc cnrr cnss cpce cpcs cpep cper cpff cpns cpps cpre cprs cpsc cpsr crcc crce crcr cre- crec cree cren crep cres crfc crfs crne crns crpc crps crsp crss cscc csce cscf cscr cscs csec csee csep cser csfc csfr csne csnp cspc cspe csps csrc csrs csse cssr eccc ecce ecef eces ecfc ecfr ecfs ecne ecpp ecrc ecrf ecrr ecsc ecse ecsp ecss eecs eeee eees eefe eefn eens eeps eerc eers eese efen efes effs ence encs enee ener enes enfp ennc enne enns enp- enrs ense epcc epec epee epen eper epes epfc epns eppc eppp epps eprp eprs epsc epsf epsp epss ercc erce ercp erec eren erer eres erfc erfs erne erns erpe erps errc erre errs erse esce escr escs esee esen eser eses esfp esfs esne espc espe espn espp esps esse essp fccf fccp fces fcps fcsc fece feen feer fees fefc fefe feff fene fenn fens fepc feps ferc fere fern ferr fers fese fess ffcc ffee ffff ffps ffrr ffss fnrs fnsp fp-c fpcc fprf frcc frcn frcp free fren frep fres frfc frns frps frsc fscc fsec fspc fspf fssc fssf fssp nccc nccf nccn nccp nccr nccs ncec ncee ncef ncen ncep ncer nces ncfc ncfe ncnc ncpc ncrc ncre ncrp ncsc ncse ncsf ncss necc nece necr necs neef neen neep neer nees nefe neff nefs nene nens nepc nepe nepr neps nerc nere nerf nerr ners nesc nese nesn nesr ness nfer nfff nfps nfrs nfsr nnes nnnn nnpr nnss npcc npes nppc npss nrcs nren nrfc nrpc nrpn nrps nrrc nrsc nrsp nscc nscs nsec nsep nser nsfc nsfs nsnr nspc nsps nsrc nssc nsse nssf nssp nssr nsss pccc pcce pccs pcep pcer pcfc pcns pcpn pcpp pcps pcrc pcre pcrf pcse pece pecr pecs peec peen peep peer pees pefc peff pefs pen- penc pene penn pens pepe peps per- perc pere perf pern perp perr pers pese pess pfce pfcs pfff pffr pfps pnec pnes pnpp pnsc ppcc ppcs ppen pper pppn pppp ppps pprc pprf ppsf ppss prcc prcf prcp prcs pre- prec pree pref pren prep pres prfc prfs prnp prps prrs prsc prse prss psec psfs psnc psnr pspp pspr psps psrp pssc psse rccc rccs rcep rcfc rcnr rcps rcsc rcss recc rece recp recr recs reef reen reep rees refe reff refn refr refs rene renn rens repe repp repr reps rere rers rese resn resp ress rfef rffc rncp rncs rnsp rpcs rpfc rppn rpps rrfc rrrr rrsp rscc rscn rscs rsee rsfc rsnn rsnr rsps rsre sccc scce sccp sccs scec scee scep scer scfc scfe scnr scpe scps 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 seep seer sees seff sene senn senr sens sepe sepn sepp sepr seps serc sere serf sern serp serr sers sesc sese sess sfcc sfcs sfer sffc sfne sfpc sfrc sfss sncc sncf sncp snee snep sner snes snns snpp snrs spcc spcs spec spee spef spen sper spes spfc spfs spne spns sppf spps sprs spse spsp spss srcc srec sres srfc srnn srpc srps srsp sscc ssce sscp sscs ssec ssee ssep sses ssfc ssfp ssns sspc sspe sspf ssps ssrc ssrs sssc sssf ssss