cccc cccs ccee ccrc ccre ccrs ccss cec- cece cecs ceec cees ceke cer- cerc cere cers cesc cese cesr cess ckck ckcs cker ckrc crcc crce crcr cre- crec cree cres crkc crss cscc csce cscr cscs csec csee cser csks csrc csrs csse cssr eccc ecce eces ecks ecrc ecrr ecsc ecse ecss eecs eeee eees eeke eeks eerc eers eese eesk ekek eker ekes ercc erce erec erer eres erke erks errc erre errs erse esce escr escs esee esek eser eses eske esks esse kccc kcck kccr kcec kcee kckc kckk kckr kcrc kcrr kcrs kcsc kcse kcsr kcss keck kecr keek keer kees kekc keke keks ker- kerc kere kerk kerr kers kesc kesk kesr kess kkck kkcr kkcs kkkk kkrc kkre kkrk kkrr kkrs kkse kksr kkss krcc krce krcs krec kree krek kres krkc krke krkk krkr krks krrc krre krrk krrr krrs krsc krse krsk krsr krss ksce ksck kscr kscs ksec ksee ksek kser kske kskk kskr ksks ksrr ksrs ksse kssr ksss rccc rccs rcsc rcss recc rece reck recr recs reek rees reke reks rere rers rese ress rkss rrrr rscc rscs rsee rsre sccc scce sccs scec scee scer sck- scr- scrc scre scrs scsc scsr se-c se-e se-k se-s sec- secc sece seck secr secs seec seek seer sees seke sekk serc sere serk serr sers sesc sese sess skee sker skes skss srcc srec sres sscc ssce sscs ssec ssee sses ssrc ssrs sssc ssss