cccc cccs cccu cccv ccee ccrc ccre ccrs ccss ccuc ccus ccvs cec- cece cecs ceec cees cer- cerc cere cers cesc cese cesr cess crcc crce crcr cre- crec cree cres creu crss crue crus cscc csce cscr cscs csec csee cser csrc csrs csse cssr csur csus cucc cuce cuer cues cure curr curs cuss cusu cuve cvcc cver cvrr cvss eccc ecce eces ecrc ecrr ecru ecrv ecsc ecse ecss ecsu ecus eecs eeee eees eerc eers eese ercc erce erec erer eres erev errc erre errs erse eruc erur erus eruv erve esce escr escs escu esee eser eses esse essu esus euer eur- eurc eure euse ever eves evre evrs evsc rccc rccs rcsc rcss rcuv rcvr rcvs recc rece recr recs recu rees reev rere rers reru rese ress reue reus reuu reve revs rrrr rscc rscs rsee rsre ruce ruer rues rurc rure rurs ruru ruse russ rusu ruve ruvu rv-c rver sccc scce sccs scec scee scer scr- scrc scre scrs scsc scsr scsu scur se-c se-e se-s se-u sec- secc sece secr secs secu secv seec seer sees seeu serc sere serr sers seru serv sesc sese sess seur seve srcc srec sres sscc ssce sscs ssec ssee sses ssrc ssrs sssc ssss suc- succ sucr sucs suee suer sues sueu suev sur- surc sure surr surs suru surv sus- suse suss susu suus suvs svcc svce svcs svec svsc uces ucrc ucsc ucsu uers uess ure- ures urre urse urss ursu urur urus urve uscc usce uscs usee user uses ussc usse ussr usss ussu usus uuuu uv-c uver uvvu vcrs vecc veer vees ver- vere vers vesc vese vess veur veve vrse vsee vses vssc vsse vues vuse vver vvvv