a-a a-c a-t aaa aac aad aan aao aar aas aat ac- aca acc acd acn aco acr acs act ad- ada adc add adn ado adr ads adt an- ana anc and ann ano anr ans ant aoa aoc aod aon aoo aor aos aot ar- ara arc ard arn aro arr ars art as- asa asc asd asn aso asr ass ast at- ata atc atd atn ato atr ats att c-- caa cac cad can cao car cas cat cca ccc ccd ccn cco ccr ccs cct cda cdc cdd cdn cdo cdr cds cdt cn- cna cnc cnd cnn cno cnr cns cnt co- coa coc cod con coo cor cos cot cra crc crd crn cro crr crs crt csa csc csd csn cso csr css cst cta ctc ctd ctn cto ctr cts ctt daa dac dad dan dao dar das dat dca dcc dcd dcn dco dcr dcs dct dda ddc ddd ddn ddo ddr dds ddt dna dnc dnd dnn dno dnr dns dnt doa doc dod don doo dor dos dot dra drc drd drn dro drr drs drt dsa dsc dsd dsn dso dsr dss dst dta dtc dtd dtn dto dtr dts dtt naa nac nad nan nao nar nas nat nca ncc ncd ncn nco ncr ncs nct nda ndc ndd ndn ndo ndr nds ndt nna nnc nnn nno nns nnt no- noa noc nod non noo nor nos not nra nrc nrd nrn nro nrr nrs nrt nsa nsc nsd nsn nso nsr nss nst nta ntc ntd ntn nto ntr nts ntt oaa oac oad oan oao oar oas oat oc- oca occ ocd ocn oco ocr ocs oct oda odc odd odn odo odr ods odt on- ona onc ond onn ono onr ons ont oo- ooa ooc ood oon ooo oor oos oot or- ora orc ord orn oro orr ors ort os- osa osc osd osn oso osr oss ost ot- ota otc otd otn oto otr ots ott ra- raa rac rad ran rao rar ras rat rca rcc rcd rcn rco rcr rcs rct rda rdc rdd rdn rdo rdr rds rdt rna rnc rnd rnn rno rnr rns rnt roa roc rod ron roo ror ros rot rra rrc rrd rrn rrr rrs rrt rsa rsc rsd rsn rso rsr rss rst rta rtc rtd rtn rto rtr rts rtt saa sac sad san sao sar sas sat sca scc scd scn sco scr scs sct sda sdc sdd sdn sdo sdr sds sdt sna snc snd snn sno snr sns snt soa soc sod son soo sor sos sot sr- sra src srd srn sro srr srs srt ss- ssa ssc ssd ssn sso ssr sss sst sta stc std stn sto str sts stt taa tac tad tan tao tar tas tat tca tcc tcd tcn tco tcr tcs tct tda tdc tdd tdn tdo tdr tds tdt tna tnc tnd tnn tno tnr tns tnt to- toa toc tod ton too tor tos tot tra trc trd trn tro trr trs trt tsa tsc tsd tsn tso tsr tss tst tta ttc ttd ttn tto ttr tts ttt