a-a a-c aaa aac aan aap aas ac- aca acc acn acp acs an- ana anc ann anp ans ap- apa apc apn app aps as- asa asc asn asp ass c-- caa cac can cap cas cca ccc ccn ccp ccs cn- cna cnc cnn cnp cns cpa cpc cpn cpp cps csa csc csn csp css naa nac nan nap nas nca ncc ncn ncp ncs nna nnc nnn nnp nns npa npc npn npp nps nsa nsc nsn nsp nss p-p paa pac pan pap pas pca pcc pcn pcp pcs pn- pna pnc pnn pnp pns ppa ppc ppn ppp pps ps- psa psc psn psp pss saa sac san sap sas sca scc scn scp scs sna snc snn snp sns spa spc spn spp sps ss- ssa ssc ssn ssp sss