a-a a-c aaa aac aak aan aap aas ac- aca acc ack acn acp acs aka akc akk akn akp aks an- ana anc ank ann anp ans ap- apa apc apk apn app aps as- asa asc ask asn asp ass c-- caa cac cak can cap cas cca ccc cck ccn ccp ccs cka ckc cks cn- cna cnc cnn cnp cns cpa cpc cpk cpn cpp cps csa csc csk csn csp css ka- kaa kac kak kan kap kas kca kcc kck kcn kcp kcs kkc kkk kkn kkp kks kn- kna knc knk knn knp kpa kpc kpk kpn kpp kps ksa ksc ksk ksn ksp kss naa nac nak nan nap nas nca ncc nck ncn ncp ncs nka nkc nkk nkn nkp nks nna nnc nnk nnn nnp nns npa npc npn npp nps nsa nsc nsk nsn nsp nss p-p paa pac pak pan pap pas pca pcc pck pcn pcp pcs pka pkc pkn pkp pks pn- pna pnc pnk pnn pnp pns ppa ppc ppk ppn ppp pps ps- psa psc psk psn psp pss saa sac sak san sap sas sca scc sck scn scp scs sk- ska skc skk skp sks sna snc snk snn snp sns spa spc spk spn spp sps ss- ssa ssc ssk ssn ssp sss