c-- ccc cce cch cck ccs ce- cec cee ceh cek ces ch- chc che chh chk chs ckc ckh cks csc cse csh csk css ec- ecc ece ech eck ecs eec eee eek ees ehc ehe ehh ehs ekc eke ekh eks es- esc ese esh esk ess hcc hce hch hck hcs he- hec hee heh hek hes hhc hhe hhh hhk hhs hkh hkk hks hsc hse hsh hsk hss kcc kce kch kck kcs ke- kec kee keh kek kes khe khh khk khs kkc kke kkh kkk kks ksc kse ksh ksk kss scc sce sch sck scs se- sec see seh sek ses sh- shc she shh shk shs sk- skc ske skh skk sks ss- ssc sse ssh ssk sss