a-a a-c a-t aaa aac aae aan aao aas aat ac- aca acc ace acn aco acs act aea aec aee aen aeo aes aet an- ana anc ane ann ano ans ant aoa aoc aoe aon aoo aos aot as- asa asc ase asn aso ass ast at- ata atc ate atn ato ats att c-- caa cac cae can cao cas cat cca ccc cce ccn cco ccs cct ce- cea cec cee cen ceo ces cet cn- cna cnc cne cnn cno cns cnt co- coa coc coe con coo cos cot csa csc cse csn cso css cst cta ctc cte ctn cto cts ctt eaa eac eae ean eao eas eat ec- eca ecc ece ecn eco ecs ect eea eec eee een eeo ees eet en- ena enc ene enn eno ens ent eo- eoa eoc eoe eon eoo eos eot es- esa esc ese esn eso ess est eta etc ete etn eto ets ett naa nac nae nan nao nas nat nca ncc nce ncn nco ncs nct ne- nea nec nee nen neo nes net nna nnc nne nnn nno nns nnt no- noa noc noe non noo nos not nsa nsc nse nsn nso nss nst nta ntc nte ntn nto nts ntt oaa oac oae oan oao oas oat oc- oca occ ocn oco ocs oct oea oec oee oen oeo oes oet on- ona onc one onn ono ons ont oo- ooa ooc oon ooo oos oot os- osa osc ose osn oso oss ost ot- ota otc ote otn oto ots ott saa sac sae san sao sas sat sca scc sce scn sco scs sct se- sea sec see sen seo ses set sna snc sne snn sno sns snt soa soc soe son soo sos sot ss- ssa ssc sse ssn sso sss sst sta stc ste stn sto sts stt taa tac tae tan tao tas tat tca tcc tce tcn tco tcs tct te- tea tec tee ten teo tes tet tna tnc tne tnn tno tns tnt to- toa toc toe ton too tos tot tsa tsc tse tsn tso tss tst tta ttc tte ttn tto tts ttt