-ene cccc cccs cccu ccee ccnc ccne ccnr ccns ccnu ccrc ccre ccrs ccsn ccss ccuc ccus cec- cece cecs ceec cees cen- cene cens cer- cerc cere cern cers cesc cese cesr cess cnes cnrc cnrr cnss crcc crce crcr cre- crec cree cren cres creu crne crns crss crue crun crus cscc csce cscr cscs csec csee cser csne csrc csrs csse cssr csur csus cucc cuce cucn cuer cues cune cure curn curr curs cuss cusu eccc ecce eces ecne ecrc ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eens eerc eers eese ence encs enee ener enes ennc enne enns ennu enrs ense ensu enue enur enus ercc erce erec eren erer eres erne erns errc erre errs erse eruc erur erus esce escr escs escu esee esen eser eses esne esse essu esus euer eur- eurc eure euse nccc nccn nccr nccs nccu ncec ncee ncen ncer nces ncnc ncrc ncre ncsc ncse ncss ncue necc nece necr necs neen neer nees nene nens nenu nerc nere nerr ners neru nesc nese nesn nesr ness neuc neue neun neur neuu nnes nnnn nnss nrcs nren nrrc nrsc nscc nscs nsec nser nsnr nsrc nssc nsse nssr nsss nuce nucs nucu nuee nuer nunc nune nunn nuns nurc nure nurn nurr nurs nuru nuse nuss nusu rccc rccs rcnr rcsc rcss recc rece recr recs recu reen rees rene renn rens renu rere rers reru rese resn ress reue reus reuu rncs rrrr rrun rscc rscn rscs rsee rsnn rsnr rsre ruce ruen ruer rues runc rune runn runs rurc rure rurs ruru ruse russ rusu ruun sccc scce sccs scec scee scer scnr scr- scrc scre scrn scrs scsc scsn scsr scsu scun scur se-c se-e se-n se-s se-u sec- secc sece secn secr secs secu seec seen seer sees seeu sene senn senr sens serc sere sern serr sers seru sesc sese sess seur sncc snee sner snes snns snrs snur snus srcc srec sres srnn sscc ssce sscs ssec ssee sses ssns ssrc ssrs sssc ssss suc- succ sucr sucs suee suen suer sues sueu sun- sune sunn suns sunu sur- surc sure surn surr surs suru sus- suse suss susu suus uces ucrc ucsc ucsu uers uesn uess uncc unce uncs unec unee unen uner unes unne unns unrs uns- unsc unus ure- ures urne urns urre urse urss ursu urun urur urus uscc usce uscs usee usen user uses usnc usnr usnu ussc usse ussr usss ussu usun usus uuen uuuu