-er c-- ccc cce cck ccn cco ccr cct ccu ce- cec cee cek cen ceo cer cet ceu ckc cko ckt cn- cnc cne cnn cno cnr cnt cnu co- coc coe cok con coo cor cot cou crc cre crk crn cro crr crt cru ctc cte ctk ctn cto ctr ctt ctu cuc cue cuk cun cuo cur cut cuu ec- ecc ece eck ecn eco ecr ect ecu eec eee eek een eeo eer eet ekc eke eko ekr ekt eku en- enc ene enk enn eno enr ent enu eo- eoc eoe eok eon eoo eor eot eou erc ere erk ern ero err ert eru etc ete etk etn eto etr ett etu eu- euc eue eun eur eut k-t kcc kce kck kcn kcr kct kcu ke- kec kee kek ken keo ker ket kkc kke kkk kkn kkr kkt kku kn- knc kne knk knn kno knr knt knu koc koe kok kon koo kor kot kou krc krk krn kro krr krt kru ktc kte ktk ktn kto ktr ktt ktu kuc kue kuk kun kur kut kuu ncc nce nck ncn nco ncr nct ncu ne- nec nee nek nen neo ner net neu nkc nke nkk nkn nko nkr nkt nku nnc nne nnk nnn nno nnt nnu no- noc noe nok non noo nor not nou nrc nre nrk nrn nro nrr nrt nru ntc nte ntk ntn nto ntr ntt ntu nuc nue nuk nun nuo nur nut nuu oc- occ ock ocn oco ocr oct ocu oec oee oen oeo oer oet okc oke okk oko okr oku on- onc one onk onn ono onr ont onu oo- ooc ook oon ooo oor oot or- orc ore ork orn oro orr ort oru ot- otc ote otk otn oto otr ott otu ou- ouc oue ouk oun ouo our out rcc rce rcn rco rcr rct rcu re- rec ree rek ren reo rer ret reu rkc rke rkk rko rkt rku rnc rnn rno rnr rnt rnu roc roe rok ron roo ror rot rou rrc rrk rrn rrr rrt rru rtc rte rtk rtn rto rtr rtt rtu ruc rue ruk run ruo rur rut ruu tcc tce tck tcn tco tcr tct tcu te- tec tee tek ten teo ter tet teu tkc tke tkk tko tkr tkt tnc tne tnk tnn tno tnr tnt to- toc toe tok ton too tor tot tou trc tre trk trn tro trr trt tru ttc tte ttk ttn tto ttr ttt ttu tuc tue tuk tun tuo tur tut tuu ucc uce uck ucn uco ucr uct ucu uec uee uen uer uet ukc uke ukk ukn ukr uku un- unc une unk unn uno unr unt unu uoc uoe uok uon uoo uor uot ur- urc ure urk urn uro urr urt uru utc ute utk utn uto utr utt utu uuc uue uun uur uut uuu