c-- ccc cce cck cco ccu ce- cec cee cek ceo ceu ckc cko co- coc coe cok coo cou cuc cue cuk cuo cuu ec- ecc ece eck eco ecu eec eee eek eeo ekc eke eko eku eo- eoc eoe eok eoo eou eu- euc eue kcc kce kck kcu ke- kec kee kek keo kkc kke kkk kku koc koe kok koo kou kuc kue kuk kuu oc- occ ock oco ocu oec oee oeo okc oke okk oko oku oo- ooc ook ooo ou- ouc oue ouk ouo ucc uce uck uco ucu uec uee ukc uke ukk uku uoc uoe uok uoo uuc uue uuu