c-- ccc cce cck ccs ccu ce- cec cee cek ces ceu ckc cks csc cse csk css csu cuc cue cuk cus cuu ec- ecc ece eck ecs ecu eec eee eek ees ekc eke eks eku es- esc ese esk ess esu eu- euc eue eus kcc kce kck kcs kcu ke- kec kee kek kes kkc kke kkk kks kku ksc kse ksk kss ksu kuc kue kuk kus kuu scc sce sck scs scu se- sec see sek ses seu sk- skc ske skk sks sku ss- ssc sse ssk sss ssu suc sue suk sus suu ucc uce uck ucs ucu uec uee ues ukc uke ukk uku usc use usk uss usu uuc uue uus uuu