c-- ccc cce cck cco cct ccu ce- cec cee cek ceo cet ceu ckc cko ckt co- coc coe cok coo cot cou ctc cte ctk cto ctt ctu cuc cue cuk cuo cut cuu ec- ecc ece eck eco ect ecu eec eee eek eeo eet ekc eke eko ekt eku eo- eoc eoe eok eoo eot eou etc ete etk eto ett etu eu- euc eue eut k-t kcc kce kck kct kcu ke- kec kee kek keo ket kkc kke kkk kkt kku koc koe kok koo kot kou ktc kte ktk kto ktt ktu kuc kue kuk kut kuu oc- occ ock oco oct ocu oec oee oeo oet okc oke okk oko oku oo- ooc ook ooo oot ot- otc ote otk oto ott otu ou- ouc oue ouk ouo out tcc tce tck tco tct tcu te- tec tee tek teo tet teu tkc tke tkk tko tkt to- toc toe tok too tot tou ttc tte ttk tto ttt ttu tuc tue tuk tuo tut tuu ucc uce uck uco uct ucu uec uee uet ukc uke ukk uku uoc uoe uok uoo uot utc ute utk uto utt utu uuc uue uut uuu