cccc cccs cccu ccee ccrc ccre ccrs ccss ccuc ccus 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 cucq cuer cues cure curr curs cuss cusu eccc ecce eces ecrc ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eerc eers eese equ- eque equs ercc erce erec erer eres errc erre errs erse eruc erur erus esce escr escs escu esee eser eses esqr esqs esse essu esus euer eur- eurc eure euse qcue qere qerq qqqq qrss qsqs qsrs qucu quee quer ques quu- rccc rccs rcsc rcss recc rece recr recs recu rees reqs rere rers reru rese resq ress reue reus reuu rrrr rscc rscs rsee rsre ruce ruer rues rurc rure rurs ruru ruse russ rusu 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 seec seeq seer sees seeu seqq seqs sequ serc sere serq serr sers seru sesc sese sess seur srcc srec sres sscc ssce sscs ssec ssee sses ssrc ssrs sssc ssss suc- succ sucr sucs suee suer sues sueu suqs sur- surc sure surr surs suru sus- suse suss susu suus uces ucrc ucsc ucsu uers uess uqcc ure- ures urre urse urss ursu uruq urur urus uscc usce uscs usee user uses ussc usse ussr usss ussu usus uuuu