a-a a-c a-t aaa aac aan aap aat ac- aca acc acn acp act an- ana anc ann anp ant ap- apa apc apn app apt at- ata atc atn atp att c-- caa cac can cap cat cca ccc ccn ccp cct cn- cna cnc cnn cnp cnt cpa cpc cpn cpp cpt cta ctc ctn ctp ctt naa nac nan nap nat nca ncc ncn ncp nct nna nnc nnn nnp nnt npa npc npn npp npt nta ntc ntn ntp ntt p-p paa pac pan pap pat pca pcc pcn pcp pct pn- pna pnc pnn pnp pnt ppa ppc ppn ppp ppt pt- pta ptc ptn ptp ptt taa tac tan tap tat tca tcc tcn tcp tct tna tnc tnn tnp tnt tpa tpc tpn tpp tpt tta ttc ttn ttp ttt