a-a a-c aaa aac aak aan aao aap aar aas ac- aca acc ack acn aco acp acr acs aka akc akk akn ako akp akr aks an- ana anc ank ann ano anp anr ans aoa aoc aok aon aoo aop aor aos ap- apa apc apk apn apo app apr aps ar- ara arc ark arn aro arp arr ars as- asa asc ask asn aso asp asr ass c-- caa cac cak can cao cap car cas cca ccc cck ccn cco ccp ccr ccs cka ckc cko cks cn- cna cnc cnn cno cnp cnr cns co- coa coc cok con coo cop cor cos cpa cpc cpk cpn cpo cpp cpr cps cra crc crk crn cro crp crr crs csa csc csk csn cso csp csr css ka- kaa kac kak kan kao kap kar kas kca kcc kck kcn kcp kcr kcs kkc kkk kkn kkp kkr kks kn- kna knc knk knn kno knp knr koa koc kok kon koo kop kor kos kpa kpc kpk kpn kpo kpp kpr kps kra krc krk krn kro krp krr krs ksa ksc ksk ksn kso ksp ksr kss naa nac nak nan nao nap nar nas nca ncc nck ncn nco ncp ncr ncs nka nkc nkk nkn nko nkp nkr nks nna nnc nnk nnn nno nnp nns no- noa noc nok non noo nop nor nos npa npc npn npo npp npr nps nra nrc nrk nrn nro nrp nrr nrs nsa nsc nsk nsn nso nsp nsr nss oaa oac oak oan oao oap oar oas oc- oca occ ock ocn oco ocp ocr ocs oka okc okk oko okp okr oks on- ona onc onk onn ono onp onr ons oo- ooa ooc ook oon ooo oop oor oos op- opa opc opk opn opo opp opr ops or- ora orc ork orn oro orp orr ors os- osa osc osk osn oso osp osr oss p-p paa pac pak pan pao pap par pas pca pcc pck pcn pco pcp pcr pcs pka pkc pkn pko pkp pkr pks pn- pna pnc pnk pnn pno pnp pnr pns poa poc pok pon poo pop por pos ppa ppc ppk ppn ppo ppp ppr pps pra prc prk prn pro prp prr prs ps- psa psc psk psn pso psp psr pss ra- raa rac rak ran rao rap rar ras rca rcc rcn rco rcp rcr rcs rkc rkk rko rkp rks rna rnc rnn rno rnp rnr rns roa roc rok ron roo rop ror ros rpa rpc rpk rpn rpo rpp rpr rps rra rrc rrk rrn rrp rrr rrs rsa rsc rsk rsn rso rsp rsr rss saa sac sak san sao sap sar sas sca scc sck scn sco scp scr scs sk- ska skc skk sko skp skr sks sna snc snk snn sno snp snr sns soa soc sok son soo sop sor sos spa spc spk spn spo spp spr sps sr- sra src srk srn sro srp srr srs ss- ssa ssc ssk ssn sso ssp ssr sss