a-a a-c a-t aaa aac aad aaf aan aao aas aat ac- aca acc acd acf acn aco acs act ad- ada adc add adf adn ado ads adt af- afa afc afd aff afn afo afs aft an- ana anc and anf ann ano ans ant aoa aoc aod aof aon aoo aos aot as- asa asc asd asf asn aso ass ast at- ata atc atd atf atn ato ats att c-- caa cac cad caf can cao cas cat cca ccc ccd ccf ccn cco ccs cct cda cdc cdd cdf cdn cdo cds cdt cfa cfc cfd cff cfn cfo cfs cft cn- cna cnc cnd cnf cnn cno cns cnt co- coa coc cod cof con coo cos cot csa csc csd csf csn cso css cst cta ctc ctd ctf ctn cto cts ctt daa dac dad daf dan dao das dat dca dcc dcd dcf dcn dco dcs dct dda ddc ddd ddf ddn ddo dds ddt dfa dfc dfd dff dfn dfo dfs dft dna dnc dnd dnf dnn dno dns dnt doa doc dod dof don doo dos dot dsa dsc dsd dsf dsn dso dss dst dta dtc dtd dtf dtn dto dts dtt faa fac fad faf fan fao fas fat fca fcc fcd fcf fcn fco fcs fct fda fdc fdd fdf fdn fdo fds fdt ffa ffc ffd fff ffn ffo ffs fft fna fnc fnd fnf fnn fns fnt foa foc fof fon foo fos fot fsa fsc fsd fsf fsn fso fss fst fta ftc ftd ftf ftn fto fts ftt naa nac nad naf nan nao nas nat nca ncc ncd ncf ncn nco ncs nct nda ndc ndd ndf ndn ndo nds ndt nfa nfc nfd nff nfn nfo nfs nft nna nnc nnf nnn nno nns nnt no- noa noc nod nof non noo nos not nsa nsc nsd nsf nsn nso nss nst nta ntc ntd ntf ntn nto nts ntt oaa oac oad oaf oan oao oas oat oc- oca occ ocd ocf ocn oco ocs oct oda odc odd odf odn odo ods odt of- ofa ofc ofd off ofn ofo ofs oft on- ona onc ond onf onn ono ons ont oo- ooa ooc ood oof oon ooo oos oot os- osa osc osd osf osn oso oss ost ot- ota otc otd otf otn oto ots ott saa sac sad saf san sao sas sat sca scc scd scf scn sco scs sct sda sdc sdd sdf sdn sdo sds sdt sfa sfc sfd sff sfn sfo sfs sft sna snc snd snf snn sno sns snt soa soc sod sof son soo sos sot ss- ssa ssc ssd ssf ssn sso sss sst sta stc std stf stn sto sts stt taa tac tad taf tan tao tas tat tca tcc tcd tcf tcn tco tcs tct tda tdc tdd tdf tdn tdo tds tdt tfa tfc tfd tff tfn tfo tfs tft tna tnc tnd tnf tnn tno tns tnt to- toa toc tod tof ton too tos tot tsa tsc tsd tsf tsn tso tss tst tta ttc ttd ttf ttn tto tts ttt