cccc cccs ccee ccss ccst cctc cctt cec- cece cecs cect ceec cees cesc cese cess cest cet- cete cets cexe cscc csce cscs csec csee cset csse cstc csts cstx csxt ctec ctsc ctss ctts cxxx eccc ecce ecct eces ecsc ecse ecss ect- ectc ects eecs eeee eees eese eetc eete eets eext esce escs esee eses eset esse esst estc este ests etcc etcs etec etee etes ette exec exes exte exts sccc scce sccs scct scec scee scet scsc scst sctc scts se-c se-e se-s se-t se-x sec- secc sece secs sect seec sees seet seex sesc sese sess sest set- setc sete sets sett setx sex- sexe sext sscc ssce sscs ssec ssee sses sset ssex sssc ssss sstc ssts stcc stcs stec stee stes stet stex stss sttc tccc tctc tcts tecs tect teec tees teet tesc tese tess test tete tets tett tetx text tscc tsec tses tset tsse tsst tstc tsts ttss tttt xces xexe xxxx