a-a a-c a-t aaa aac aae aaf aan aao aas aat ac- aca acc ace acf acn aco acs act aea aec aee aef aen aeo aes aet af- afa afc afe aff afn afo afs aft an- ana anc ane anf ann ano ans ant aoa aoc aoe aof aon aoo aos aot as- asa asc ase asf asn aso ass ast at- ata atc ate atf atn ato ats att c-- caa cac cae caf can cao cas cat cca ccc cce ccf ccn cco ccs cct ce- cea cec cee cef cen ceo ces cet cfa cfc cfe cff cfn cfo cfs cft cn- cna cnc cne cnf cnn cno cns cnt co- coa coc coe cof con coo cos cot csa csc cse csf csn cso css cst cta ctc cte ctf ctn cto cts ctt eaa eac eae eaf ean eao eas eat ec- eca ecc ece ecf ecn eco ecs ect eea eec eee eef een eeo ees eet ef- efa efc efe eff efo efs eft en- ena enc ene enf enn eno ens ent eo- eoa eoc eoe eof eon eoo eos eot es- esa esc ese esf esn eso ess est eta etc ete etf etn eto ets ett faa fac fae faf fan fao fas fat fca fcc fce fcf fcn fco fcs fct fea fec fee fef fen feo fes fet ffa ffc ffe fff ffn ffo ffs fft fna fnc fne fnf fnn fns fnt foa foc foe fof fon foo fos fot fsa fsc fse fsf fsn fso fss fst fta ftc fte ftf ftn fto fts ftt naa nac nae naf nan nao nas nat nca ncc nce ncf ncn nco ncs nct ne- nea nec nee nef nen neo nes net nfa nfc nfe nff nfn nfo nfs nft nna nnc nne nnf nnn nno nns nnt no- noa noc noe nof non noo nos not nsa nsc nse nsf nsn nso nss nst nta ntc nte ntf ntn nto nts ntt oaa oac oae oaf oan oao oas oat oc- oca occ ocf ocn oco ocs oct oea oec oee oef oen oeo oes oet of- ofa ofc ofe off ofn ofo ofs oft on- ona onc one onf onn ono ons ont oo- ooa ooc oof oon ooo oos oot os- osa osc ose osf osn oso oss ost ot- ota otc ote otf otn oto ots ott saa sac sae saf san sao sas sat sca scc sce scf scn sco scs sct se- sea sec see sef sen seo ses set sfa sfc sfe sff sfn sfo sfs sft sna snc sne snf snn sno sns snt soa soc soe sof son soo sos sot ss- ssa ssc sse ssf ssn sso sss sst sta stc ste stf stn sto sts stt taa tac tae taf tan tao tas tat tca tcc tce tcf tcn tco tcs tct te- tea tec tee tef ten teo tes tet tfa tfc tfe tff tfn tfo tfs tft tna tnc tne tnf tnn tno tns tnt to- toa toc toe tof ton too tos tot tsa tsc tse tsf tsn tso tss tst tta ttc tte ttf ttn tto tts ttt