c-- ccc ccf ccn cco ccr cct cfc cff cfn cfo cfr cft cn- cnc cnf cnn cno cnr cnt co- coc cof con coo cor cot crc crf crn cro crr crt ctc ctf ctn cto ctr ctt fcc fcf fcn fco fcr fct ffc fff ffn ffo ffr fft fnc fnf fnn fnr fnt foc fof fon foo for fot frc frf frn fro frr frt ftc ftf ftn fto ftr ftt ncc ncf ncn nco ncr nct nfc nff nfn nfo nfr nft nnc nnf nnn nno nnt no- noc nof non noo nor not nrc nrf nrn nro nrr nrt ntc ntf ntn nto ntr ntt oc- occ ocf ocn oco ocr oct of- ofc off ofn ofo ofr oft on- onc onf onn ono onr ont oo- ooc oof oon ooo oor oot or- orc orf orn oro orr ort ot- otc otf otn oto otr ott rcc rcf rcn rco rcr rct rfc rff rfn rfo rfr rft rnc rnn rno rnr rnt roc rof ron roo ror rot rrc rrf rrn rrr rrt rtc rtf rtn rto rtr rtt tcc tcf tcn tco tcr tct tfc tff tfn tfo tfr tft tnc tnf tnn tno tnr tnt to- toc tof ton too tor tot trc trf trn tro trr trt ttc ttf ttn tto ttr ttt