a-a a-c a-t aaa aac aad aan aao aas aat ac- aca acc acd acn aco acs act ad- ada adc add adn ado ads adt an- ana anc and ann ano ans ant aoa aoc aod aon aoo aos aot as- asa asc asd asn aso ass ast at- ata atc atd atn ato ats att c-- caa cac cad can cao cas cat cca ccc ccd ccn cco ccs cct cda cdc cdd cdn cdo cds cdt cn- cna cnc cnd cnn cno cns cnt co- coa coc cod con coo cos cot csa csc csd csn cso css cst cta ctc ctd ctn cto cts ctt daa dac dad dan dao das dat dca dcc dcd dcn dco dcs dct dda ddc ddd ddn ddo dds ddt dna dnc dnd dnn dno dns dnt doa doc dod don doo dos dot dsa dsc dsd dsn dso dss dst dta dtc dtd dtn dto dts dtt naa nac nad nan nao nas nat nca ncc ncd ncn nco ncs nct nda ndc ndd ndn ndo nds ndt nna nnc nnn nno nns nnt no- noa noc nod non noo nos not nsa nsc nsd nsn nso nss nst nta ntc ntd ntn nto nts ntt oaa oac oad oan oao oas oat oc- oca occ ocd ocn oco ocs oct oda odc odd odn odo ods odt on- ona onc ond onn ono ons ont oo- ooa ooc ood oon ooo oos oot os- osa osc osd osn oso oss ost ot- ota otc otd otn oto ots ott saa sac sad san sao sas sat sca scc scd scn sco scs sct sda sdc sdd sdn sdo sds sdt sna snc snd snn sno sns snt soa soc sod son soo sos sot ss- ssa ssc ssd ssn sso sss sst sta stc std stn sto sts stt taa tac tad tan tao tas tat tca tcc tcd tcn tco tcs tct tda tdc tdd tdn tdo tds tdt tna tnc tnd tnn tno tns tnt to- toa toc tod ton too tos tot tsa tsc tsd tsn tso tss tst tta ttc ttd ttn tto tts ttt