-er -ey c-- ccc cce cck ccr ccs ccu ce- cec cee cek cer ces ceu cey ckc cks cky crc cre crk crr crs cru cry csc cse csk csr css csu csy cuc cue cuk cur cus cuu cuy cyc cye cyk cyr cys ec- ecc ece eck ecr ecs ecu eec eee eek eer ees eey ekc eke ekr eks eku eky erc ere erk err ers eru ery es- esc ese esk esr ess esu esy eu- euc eue eur eus eyc eye eyr eys kcc kce kck kcr kcs kcu ke- kec kee kek ker kes key kkc kke kkk kkr kks kku kky krc krk krr krs kru kry ksc kse ksk ksr kss ksu kuc kue kuk kur kus kuu kuy kyc kye kyr kys kyu rcc rce rcr rcs rcu re- rec ree rek rer res reu rey rkc rke rkk rks rku rky rrc rrk rrr rrs rru rsc rse rsk rsr rss rsu ruc rue ruk rur rus ruu ruy ry- ryc rye ryk ryr rys ryu ryy scc sce sck scr scs scu se- sec see sek ser ses seu sey sk- skc ske skk skr sks sku sky sr- src sre srk srr srs sry ss- ssc sse ssk ssr sss ssu suc sue suk sur sus suu suy sy- syc sye syk syr sys syu ucc uce uck ucr ucs ucu uec uee uer ues uey ukc uke ukk ukr uku ur- urc ure urk urr urs uru ury usc use usk usr uss usu uuc uue uur uus uuu uyc uys uyu ycc yce ycs ycu ycy yec yee yek yer yes yey ykk yrc yre yrs yru ysc yse ysk ysr yss ysu ysy yue yuk yur yus yuu yuy yyc yye yys yyu yyy