a-a a-c a-t aaa aac aae aan aao aap aas aat ac- aca acc ace acn aco acp acs act aea aec aee aen aeo aep aes aet an- ana anc ane ann ano anp ans ant aoa aoc aoe aon aoo aop aos aot ap- apa apc ape apn apo app aps apt as- asa asc ase asn aso asp ass ast at- ata atc ate atn ato atp ats att c-- caa cac cae can cao cap cas cat cca ccc cce ccn cco ccp ccs cct ce- cea cec cee cen ceo cep ces cet cn- cna cnc cne cnn cno cnp cns cnt co- coa coc coe con coo cop cos cot cpa cpc cpe cpn cpo cpp cps cpt csa csc cse csn cso csp css cst cta ctc cte ctn cto ctp cts ctt eaa eac eae ean eao eap eas eat ec- eca ecc ece ecn eco ecs ect eea eec eee een eeo eep ees eet en- ena enc ene enn eno enp ens ent eo- eoa eoc eoe eon eoo eop eos eot ep- epa epc epe epn epo epp eps ept es- esa esc ese esn eso esp ess est eta etc ete etn eto etp ets ett naa nac nae nan nao nap nas nat nca ncc nce ncn nco ncp ncs nct ne- nea nec nee nen neo nep nes net nna nnc nne nnn nno nnp nns nnt no- noa noc noe non noo nop nos not npa npc npe npn npo npp nps npt nsa nsc nse nsn nso nsp nss nst nta ntc nte ntn nto ntp nts ntt oaa oac oae oan oao oap oas oat oc- oca occ ocn oco ocp ocs oct oea oec oee oen oeo oep oes oet on- ona onc one onn ono onp ons ont oo- ooa ooc oon ooo oop oos oot op- opa opc ope opn opo opp ops opt os- osa osc ose osn oso osp oss ost ot- ota otc ote otn oto otp ots ott p-p paa pac pae pan pao pap pas pat pca pcc pce pcn pco pcp pcs pct pea pec pee pen peo pep pes pet pn- pna pnc pne pnn pno pnp pns pnt poa poc poe pon poo pop pos pot ppa ppc ppe ppn ppo ppp pps ppt ps- psa psc pse psn pso psp pss pst pt- pta ptc pte ptn pto ptp pts ptt saa sac sae san sao sap sas sat sca scc sce scn sco scp scs sct se- sea sec see sen seo sep ses set sna snc sne snn sno snp sns snt soa soc soe son soo sop sos sot spa spc spe spn spo spp sps spt ss- ssa ssc sse ssn sso ssp sss sst sta stc ste stn sto stp sts stt taa tac tae tan tao tap tas tat tca tcc tce tcn tco tcp tcs tct te- tea tec tee ten teo tep tes tet tna tnc tne tnn tno tnp tns tnt to- toa toc toe ton too top tos tot tpa tpc tpe tpn tpo tpp tps tpt tsa tsc tse tsn tso tsp tss tst tta ttc tte ttn tto ttp tts ttt