a-a a-c a-t aaa aac aae aan aap aat ac- aca acc ace acn acp act aea aec aee aen aep aet an- ana anc ane ann anp ant ap- apa apc ape apn app apt at- ata atc ate atn atp att c-- caa cac cae can cap cat cca ccc cce ccn ccp cct ce- cea cec cee cen cep cet cn- cna cnc cne cnn cnp cnt cpa cpc cpe cpn cpp cpt cta ctc cte ctn ctp ctt eaa eac eae ean eap eat ec- eca ecc ece ecn ect eea eec eee een eep eet en- ena enc ene enn enp ent ep- epa epc epe epn epp ept eta etc ete etn etp ett naa nac nae nan nap nat nca ncc nce ncn ncp nct ne- nea nec nee nen nep net nna nnc nne nnn nnp nnt npa npc npe npn npp npt nta ntc nte ntn ntp ntt p-p paa pac pae pan pap pat pca pcc pce pcn pcp pct pea pec pee pen pep pet pn- pna pnc pne pnn pnp pnt ppa ppc ppe ppn ppp ppt pt- pta ptc pte ptn ptp ptt taa tac tae tan tap tat tca tcc tce tcn tcp tct te- tea tec tee ten tep tet tna tnc tne tnn tnp tnt tpa tpc tpe tpn tpp tpt tta ttc tte ttn ttp ttt