cccc cccs cccu ccee ccrc ccre ccrs ccss ccuc ccus cec- cece cecs ceec cees cer- cerc cere cers cesc cese cesr cess ceux cexe crcc crce crcr cre- crec cree cres creu crex crss crue crus crux cscc csce cscr cscs csec csee cser csrc csrs csse cssr csur csus cucc cuce cuer cues cure curr curs cuss cusu cxxx eccc ecce eces ecrc ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eerc eers eese er-x ercc erce erec erer eres errc erre errs erse eruc erur erus esce escr escs escu esee eser eses esse essu esus euer eur- eurc eure euse exec exer exes exrx rccc rccs rcsc rcss recc rece recr recs recu rees rere rers reru rese ress reue reus reuu reux rexx rrrr rscc rscs rsee rsre ruce ruer rues rurc rure rurs ruru ruse russ rusu rxes sccc scce sccs scec scee scer scr- scrc scre scrs scsc scsr scsu scur se-c se-e se-s se-u se-x sec- secc sece secr secs secu seec seer sees seeu seex serc sere serr sers seru sesc sese sess seur seux sex- sexe srcc srec sres sscc ssce sscs ssec ssee sses ssex ssrc ssrs sssc ssss suc- succ sucr sucs suee suer sues sueu sur- surc sure surr surs suru sus- suse suss susu suus sux- suxe uces ucrc ucsc ucsu uers uess ure- ures urex urre urse urss ursu urur urus uscc usce uscs usee user uses ussc usse ussr usss ussu usus uuuu uxue uxus xces xeer xer- xers xeus xexe xurs xuxu xxxx