-ene cccc cccp cccs ccee ccnc ccne ccnp ccns ccpe ccpn ccpp ccps ccsn ccsp ccss cec- cece cecp cecs ceec cees cen- cene cens cepc cepe cepp ceps cesc cese cesp cess cexe cncp cnep cnes cnex cnss cpce cpcs cpep cpns cpps cpsc cpsx cscc csce cscs csec csee csep csne csnp cspc cspe csps csse cxxx eccc ecce eces ecne ecpp ecsc ecse ecsp ecss eecs eeee eees eens eeps eese ence encs enee enes ennc enne enns enp- ense epcc epec epee epen epes epns eppc eppp epps epsc epsp epss epsx epxp esce escs esee esen eses esne espc espe espn espp esps esse essp exec exen exes expn nccc nccn nccp nccs ncec ncee ncen ncep nces ncnc ncpc ncsc ncse ncss necc nece necs neen neep nees nene nens nepc nepe neps nesc nese nesn ness nexe nexx nnes nnnn nnss npcc npes nppc npss nscc nscs nsec nsep nspc nsps nssc nsse nssp nsss pccc pcce pccs pcep pcns pcnx pcpn pcpp pcps pcse pece pecs peec peen peep pees pen- penc pene penn pens pepe peps pese pess pnec pnes pnpp pnsc ppcc ppcs ppen pppn pppp ppps ppss psec psnc pspp psps pssc psse pxes sccc scce sccp sccs scec scee scep scpe scps scsc scsn se-c se-e se-n se-s se-x sec- secc sece secn secs seec seen seep sees seex sene senn sens sepe sepn sepp seps sepx sesc sese sess sex- sexe sexp sncc sncp snee snep snes snns snpp spcc spcs spec spee spen spes spex spne spns spps spse spsp spss sscc ssce sscp sscs ssec ssee ssep sses ssex ssns sspc sspe ssps sspx sssc ssss xces xen- xene xenn xexe xnee xpcc xxxx