a-a a-c a-t aaa aac aan aap aas aat ac- aca acc acn acp acs act an- ana anc ann anp ans ant ap- apa apc apn app aps apt as- asa asc asn asp ass ast at- ata atc atn atp ats att c-- caa cac can cap cas cat cca ccc ccn ccp ccs cct cn- cna cnc cnn cnp cns cnt cpa cpc cpn cpp cps cpt csa csc csn csp css cst cta ctc ctn ctp cts ctt naa nac nan nap nas nat nca ncc ncn ncp ncs nct nna nnc nnn nnp nns nnt npa npc npn npp nps npt nsa nsc nsn nsp nss nst nta ntc ntn ntp nts ntt p-p paa pac pan pap pas pat pca pcc pcn pcp pcs pct pn- pna pnc pnn pnp pns pnt ppa ppc ppn ppp pps ppt ps- psa psc psn psp pss pst pt- pta ptc ptn ptp pts ptt saa sac san sap sas sat sca scc scn scp scs sct sna snc snn snp sns snt spa spc spn spp sps spt ss- ssa ssc ssn ssp sss sst sta stc stn stp sts stt taa tac tan tap tas tat tca tcc tcn tcp tcs tct tna tnc tnn tnp tns tnt tpa tpc tpn tpp tps tpt tsa tsc tsn tsp tss tst tta ttc ttn ttp tts ttt