cccc cccs ccee ccrc ccre ccrs ccss cec- cece cecs ceec cees cer- cerc cere cers cery cesc cese cesr cess ceys crcc crce crcr cre- crec cree cres crss cry- crys cscc csce cscr cscs csec csee cser csrc csrs csse cssr csys cyc- cycc cycs cyre cyrs cyse cyy- cyyc eccc ecce eces ecrc ecrr ecsc ecse ecss eecs eeee eees eerc eers eery eese eesy ercc erce erec erer eres errc erre errs erse eryc erye esce escr escs esee eser eses esse essy eyec eyer eyes eyey eyre eyry eyse eyyr rccc rccs rcsc rcss rcyc recc rece recr recs recy rees rere rers rery rese ress reye reys rrrr rscc rscs rscy rsee rsre ryes rysy sccc scce sccs sccy scec scee scer scey scr- scrc scre scrs scry scsc scsr scye se-c se-e se-s se-y sec- secc sece secr secs secy seec seer sees seey serc sere serr sers sery sesc sese sess seye seys srcc srec sres sscc ssce sscs ssec ssee sses ssrc ssrs sssc ssss syce sycr syer syes syre syrs syry syse syss yccc ycee yeer yees yere yerr yers yery yess yeye yeyr ysee yser yses ysse yyyy