-er c-- ccc cce ccf ccn cco ccr cct ce- cec cee cef cen ceo cer cet cfc cfe cff cfn cfo cfr cft cn- cnc cne cnf cnn cno cnr cnt co- coc coe cof con coo cor cot crc cre crf crn cro crr crt ctc cte ctf ctn cto ctr ctt ec- ecc ece ecf ecn eco ecr ect eec eee eef een eeo eer eet ef- efc efe eff efo efr eft en- enc ene enf enn eno enr ent eo- eoc eoe eof eon eoo eor eot erc ere erf ern ero err ert etc ete etf etn eto etr ett fcc fce fcf fcn fco fcr fct fec fee fef fen feo fer fet ffc ffe fff ffn ffo ffr fft fnc fne fnf fnn fnr fnt foc foe fof fon foo for fot frc fre frf frn fro frr frt ftc fte ftf ftn fto ftr ftt ncc nce ncf ncn nco ncr nct ne- nec nee nef nen neo ner net nfc nfe nff nfn nfo nfr nft nnc nne nnf nnn nno nnt no- noc noe nof non noo nor not nrc nre nrf nrn nro nrr nrt ntc nte ntf ntn nto ntr ntt oc- occ ocf ocn oco ocr oct oec oee oef oen oeo oer oet of- ofc ofe off ofn ofo ofr oft on- onc one onf onn ono onr ont oo- ooc oof oon ooo oor oot or- orc ore orf orn oro orr ort ot- otc ote otf otn oto otr ott rcc rce rcf rcn rco rcr rct re- rec ree ref ren reo rer ret rfc rfe rff rfn rfo rfr rft rnc rnn rno rnr rnt roc roe rof ron roo ror rot rrc rrf rrn rrr rrt rtc rte rtf rtn rto rtr rtt tcc tce tcf tcn tco tcr tct te- tec tee tef ten teo ter tet tfc tfe tff tfn tfo tfr tft tnc tne tnf tnn tno tnr tnt to- toc toe tof ton too tor tot trc tre trf trn tro trr trt ttc tte ttf ttn tto ttr ttt