a-a a-c a-t aaa aac aae aak aan aap aat ac- aca acc ace ack acn acp act aea aec aee aek aen aep aet aka akc ake akk akn akp an- ana anc ane ank ann anp ant ap- apa apc ape apk apn app apt at- ata atc ate atn atp att c-- caa cac cae cak can cap cat cca ccc cce cck ccn ccp cct ce- cea cec cee cek cen cep cet cka ckc ckt cn- cna cnc cne cnn cnp cnt cpa cpc cpe cpk cpn cpp cpt cta ctc cte ctk ctn ctp ctt eaa eac eae eak ean eap eat ec- eca ecc ece eck ecn ect eea eec eee eek een eep eet eka ekc eke ekp ekt en- ena enc ene enk enn enp ent ep- epa epc epe epn epp ept eta etc ete etk etn etp ett k-t ka- kaa kac kae kak kan kap kat kca kcc kce kck kcn kcp kct ke- kea kec kee kek ken kep ket kkc kke kkk kkn kkp kkt kn- kna knc kne knk knn knp knt kpa kpc kpe kpk kpn kpp kpt kta ktc kte ktk ktn ktp ktt naa nac nae nak nan nap nat nca ncc nce nck ncn ncp nct ne- nea nec nee nek nen nep net nka nkc nke nkk nkn nkp nkt nna nnc nne nnk nnn nnp nnt npa npc npe npn npp npt nta ntc nte ntk ntn ntp ntt p-p paa pac pae pak pan pap pat pca pcc pce pck pcn pcp pct pea pec pee pek pen pep pet pka pkc pke pkn pkp pkt pn- pna pnc pne pnk pnn pnp pnt ppa ppc ppe ppk ppn ppp ppt pt- pta ptc pte ptk ptn ptp ptt taa tac tae tak tan tap tat tca tcc tce tck tcn tcp tct te- tea tec tee tek ten tep tet tka tkc tke tkk tkp tkt tna tnc tne tnk tnn tnp tnt tpa tpc tpe tpk tpn tpp tpt tta ttc tte ttk ttn ttp ttt