a-a a-c a-t aaa aac aaf aan aao aar aas aat ac- aca acc acf acn aco acr acs act af- afa afc aff afn afo afr afs aft an- ana anc anf ann ano anr ans ant aoa aoc aof aon aoo aor aos aot ar- ara arc arf arn aro arr ars art as- asa asc asf asn aso asr ass ast at- ata atc atf atn ato atr ats att c-- caa cac caf can cao car cas cat cca ccc ccf ccn cco ccr ccs cct cfa cfc cff cfn cfo cfr cfs cft cn- cna cnc cnf cnn cno cnr cns cnt co- coa coc cof con coo cor cos cot cra crc crf crn cro crr crs crt csa csc csf csn cso csr css cst cta ctc ctf ctn cto ctr cts ctt faa fac faf fan fao far fas fat fca fcc fcf fcn fco fcr fcs fct ffa ffc fff ffn ffo ffr ffs fft fna fnc fnf fnn fnr fns fnt foa foc fof fon foo for fos fot fra frc frf frn fro frr frs frt fsa fsc fsf fsn fso fsr fss fst fta ftc ftf ftn fto ftr fts ftt naa nac naf nan nao nar nas nat nca ncc ncf ncn nco ncr ncs nct nfa nfc nff nfn nfo nfr nfs nft nna nnc nnf nnn nno nns nnt no- noa noc nof non noo nor nos not nra nrc nrf nrn nro nrr nrs nrt nsa nsc nsf nsn nso nsr nss nst nta ntc ntf ntn nto ntr nts ntt oaa oac oaf oan oao oar oas oat oc- oca occ ocf ocn oco ocr ocs oct of- ofa ofc off ofn ofo ofr ofs oft on- ona onc onf onn ono onr ons ont oo- ooa ooc oof oon ooo oor oos oot or- ora orc orf orn oro orr ors ort os- osa osc osf osn oso osr oss ost ot- ota otc otf otn oto otr ots ott ra- raa rac raf ran rao rar ras rat rca rcc rcf rcn rco rcr rcs rct rfa rfc rff rfn rfo rfr rfs rft rna rnc rnn rno rnr rns rnt roa roc rof ron roo ror ros rot rra rrc rrf rrn rrr rrs rrt rsa rsc rsf rsn rso rsr rss rst rta rtc rtf rtn rto rtr rts rtt saa sac saf san sao sar sas sat sca scc scf scn sco scr scs sct sfa sfc sff sfn sfo sfr sfs sft sna snc snf snn sno snr sns snt soa soc sof son soo sor sos sot sr- sra src srf srn sro srr srs srt ss- ssa ssc ssf ssn sso ssr sss sst sta stc stf stn sto str sts stt taa tac taf tan tao tar tas tat tca tcc tcf tcn tco tcr tcs tct tfa tfc tff tfn tfo tfr tfs tft tna tnc tnf tnn tno tnr tns tnt to- toa toc tof ton too tor tos tot tra trc trf trn tro trr trs trt tsa tsc tsf tsn tso tsr tss tst tta ttc ttf ttn tto ttr tts ttt