cccc cccs ccee ccrc ccre ccrs ccrt ccss ccst cctc cctt cec- cece cecs cect ceec cees cer- cerc cere cers cert cesc cese cesr cess cest cet- cete cets crcc crce crcr cre- crec cree cres cret crrt crss crst crtc crts cscc csce cscr cscs csec csee cser cset csrc csrs csse cssr cstc cstr csts ctec ctrc ctrs ctsc ctss ctts eccc ecce ecct eces ecrc ecrr ecsc ecse ecss ect- ectc ects eecs eeee eees eerc eers eese eetc eete eets ercc erce erec erer eres eret errc erre errs erse erst erts esce escr escs esee eser eses eset esse esst estc este estr ests etcc etcs etec etee eter etes etre ette rccc rccs rcet rcsc rcss rctc rcts recc rece recr recs rect rees reet rere rers rert rese ress rest rete retr rets rett rrrr rscc rscs rsee rsre rsts rtcc rtce rtee rtes rtss rtts sccc scce sccs scct scec scee scer scet scr- scrc scre scrs scsc scsr scst sctc sctr scts se-c se-e se-s se-t sec- secc sece secr secs sect seec seer sees seet serc sere serr sers sert sesc sese sess sest set- setc sete sets sett srcc srct srec sres srtr sscc ssce sscs ssec ssee sses sset ssrc ssrs sssc ssss sstc ssts stcc stcs stec stee ster stes stet strc stre strs stss sttc sttr tccc tctc tcts tecr tecs tect teec teer tees teet ter- terc tere terr ters tesc tese tess test tete tetr tets tett trcc tre- trec tree tres tret trst trtc trte trtr tscc tsec tses tset tsse tssr tsst tstc tsts tter ttss tttt