c-- ccc cce cck cco ccs ccu ce- cec cee cek ceo ces ceu ckc cko cks co- coc coe cok coo cos cou csc cse csk cso css csu cuc cue cuk cuo cus cuu ec- ecc ece eck eco ecs ecu eec eee eek eeo ees ekc eke eko eks eku eo- eoc eoe eok eoo eos eou es- esc ese esk eso ess esu eu- euc eue eus kcc kce kck kcs kcu ke- kec kee kek keo kes kkc kke kkk kks kku koc koe kok koo kos kou ksc kse ksk kso kss ksu kuc kue kuk kus kuu oc- occ ock oco ocs ocu oec oee oeo oes okc oke okk oko oks oku oo- ooc ook ooo oos os- osc ose osk oso oss osu ou- ouc oue ouk ouo ous scc sce sck sco scs scu se- sec see sek seo ses seu sk- skc ske skk sko sks sku soc soe sok soo sos sou ss- ssc sse ssk sso sss ssu suc sue suk suo sus suu ucc uce uck uco ucs ucu uec uee ues ukc uke ukk uku uoc uoe uok uoo uos usc use usk uso uss usu uuc uue uus uuu