a-a a-c aaa aac aak aan aap aar aas ac- aca acc ack acn acp acr acs aka akc akk akn akp akr aks an- ana anc ank ann anp anr ans ap- apa apc apk apn app apr aps ar- ara arc ark arn arp arr ars as- asa asc ask asn asp asr ass c-- caa cac cak can cap car cas cca ccc cck ccn ccp ccr ccs cka ckc cks cn- cna cnc cnn cnp cnr cns cpa cpc cpk cpn cpp cpr cps cra crc crk crn crp crr crs csa csc csk csn csp csr css ka- kaa kac kak kan kap kar kas kca kcc kck kcn kcp kcr kcs kkc kkk kkn kkp kkr kks kn- kna knc knk knn knp knr kpa kpc kpk kpn kpp kpr kps kra krc krk krn krp krr krs ksa ksc ksk ksn ksp ksr kss naa nac nak nan nap nar nas nca ncc nck ncn ncp ncr ncs nka nkc nkk nkn nkp nkr nks nna nnc nnk nnn nnp nns npa npc npn npp npr nps nra nrc nrk nrn nrp nrr nrs nsa nsc nsk nsn nsp nsr nss p-p paa pac pak pan pap par pas pca pcc pck pcn pcp pcr pcs pka pkc pkn pkp pkr pks pn- pna pnc pnk pnn pnp pnr pns ppa ppc ppk ppn ppp ppr pps pra prc prk prn prp prr prs ps- psa psc psk psn psp psr pss ra- raa rac rak ran rap rar ras rca rcc rcn rcp rcr rcs rkc rkk rkp rks rna rnc rnn rnp rnr rns rpa rpc rpk rpn rpp rpr rps rra rrc rrk rrn rrp rrr rrs rsa rsc rsk rsn rsp rsr rss saa sac sak san sap sar sas sca scc sck scn scp scr scs sk- ska skc skk skp skr sks sna snc snk snn snp snr sns spa spc spk spn spp spr sps sr- sra src srk srn srp srr srs ss- ssa ssc ssk ssn ssp ssr sss