cccc cccs ccee ccss cec- cece cecs ceec cees cesc cese cess ceys cscc csce cscs csec csee csse csys cyc- cycc cycs cyse cyy- cyyc eccc ecce eces ecsc ecse ecss eecs eeee eees eese eesy esce escs esee eses esse essy eyec eyes eyey eyse sccc scce sccs sccy scec scee scey scsc scye se-c se-e se-s se-y sec- secc sece secs secy seec sees seey sesc sese sess seye seys sscc ssce sscs ssec ssee sses sssc ssss syce syes syse syss yccc ycee yees yess yeye ysee yses ysse yyyy