-er c-- ccc cce ccf cck ccn cco ccr cct ce- cec cee cef cek cen ceo cer cet cfc cfe cff cfk cfn cfo cfr cft ckc cko ckt cn- cnc cne cnf cnn cno cnr cnt co- coc coe cof cok con coo cor cot crc cre crf crk crn cro crr crt ctc cte ctf ctk ctn cto ctr ctt ec- ecc ece ecf eck ecn eco ecr ect eec eee eef eek een eeo eer eet ef- efc efe eff efo efr eft ekc eke ekf eko ekr ekt en- enc ene enf enk enn eno enr ent eo- eoc eoe eof eok eon eoo eor eot erc ere erf erk ern ero err ert etc ete etf etk etn eto etr ett fcc fce fcf fck fcn fco fcr fct fec fee fef fek fen feo fer fet ffc ffe fff ffk ffn ffo ffr fft fkc fkf fkk fkt fnc fne fnf fnk fnn fnr fnt foc foe fof fok fon foo for fot frc fre frf frk frn fro frr frt ftc fte ftf ftk ftn fto ftr ftt k-t kcc kce kck kcn kcr kct ke- kec kee kef kek ken keo ker ket kfc kff kfo kkc kke kkk kkn kkr kkt kn- knc kne knf knk knn kno knr knt koc koe kof kok kon koo kor kot krc krf krk krn kro krr krt ktc kte ktf ktk ktn kto ktr ktt ncc nce ncf nck ncn nco ncr nct ne- nec nee nef nek nen neo ner net nfc nfe nff nfk nfn nfo nfr nft nkc nke nkf nkk nkn nko nkr nkt nnc nne nnf nnk nnn nno nnt no- noc noe nof nok non noo nor not nrc nre nrf nrk nrn nro nrr nrt ntc nte ntf ntk ntn nto ntr ntt oc- occ ocf ock ocn oco ocr oct oec oee oef oen oeo oer oet of- ofc ofe off ofn ofo ofr oft okc oke okk oko okr on- onc one onf onk onn ono onr ont oo- ooc oof ook oon ooo oor oot or- orc ore orf ork orn oro orr ort ot- otc ote otf otk otn oto otr ott rcc rce rcf rcn rco rcr rct re- rec ree ref rek ren reo rer ret rfc rfe rff rfk rfn rfo rfr rft rkc rke rkf rkk rko rkt rnc rnn rno rnr rnt roc roe rof rok ron roo ror rot rrc rrf rrk rrn rrr rrt rtc rte rtf rtk rtn rto rtr rtt tcc tce tcf tck tcn tco tcr tct te- tec tee tef tek ten teo ter tet tfc tfe tff tfk tfn tfo tfr tft tkc tke tkk tko tkr tkt tnc tne tnf tnk tnn tno tnr tnt to- toc toe tof tok ton too tor tot trc tre trf trk trn tro trr trt ttc tte ttf ttk ttn tto ttr ttt