a-a a-c a-t aaa aac aaf aan aar aat ac- aca acc acf acn acr act af- afa afc aff afn afr aft an- ana anc anf ann anr ant ar- ara arc arf arn arr art at- ata atc atf atn atr att c-- caa cac caf can car cat cca ccc ccf ccn ccr cct cfa cfc cff cfn cfr cft cn- cna cnc cnf cnn cnr cnt cra crc crf crn crr crt cta ctc ctf ctn ctr ctt faa fac faf fan far fat fca fcc fcf fcn fcr fct ffa ffc fff ffn ffr fft fna fnc fnf fnn fnr fnt fra frc frf frn frr frt fta ftc ftf ftn ftr ftt naa nac naf nan nar nat nca ncc ncf ncn ncr nct nfa nfc nff nfn nfr nft nna nnc nnf nnn nnt nra nrc nrf nrn nrr nrt nta ntc ntf ntn ntr ntt ra- raa rac raf ran rar rat rca rcc rcf rcn rcr rct rfa rfc rff rfn rfr rft rna rnc rnn rnr rnt rra rrc rrf rrn rrr rrt rta rtc rtf rtn rtr rtt taa tac taf tan tar tat tca tcc tcf tcn tcr tct tfa tfc tff tfn tfr tft tna tnc tnf tnn tnr tnt tra trc trf trn trr trt tta ttc ttf ttn ttr ttt