a-a aaa aak aan aao aap aar aas aka akk akn ako akp akr aks an- ana ank ann ano anp anr ans aoa aok aon aoo aop aor aos ap- apa apk apn apo app apr aps ar- ara ark arn aro arp arr ars as- asa ask asn aso asp asr ass ka- kaa kak kan kao kap kar kas kkk kkn kkp kkr kks kn- kna knk knn kno knp knr koa kok kon koo kop kor kos kpa kpk kpn kpo kpp kpr kps kra krk krn kro krp krr krs ksa ksk ksn kso ksp ksr kss naa nak nan nao nap nar nas nka nkk nkn nko nkp nkr nks nna nnk nnn nno nnp nns no- noa nok non noo nop nor nos npa npn npo npp npr nps nra nrk nrn nro nrp nrr nrs nsa nsk nsn nso nsp nsr nss oaa oak oan oao oap oar oas oka okk oko okp okr oks on- ona onk onn ono onp onr ons oo- ooa ook oon ooo oop oor oos op- opa opk opn opo opp opr ops or- ora ork orn oro orp orr ors os- osa osk osn oso osp osr oss p-p paa pak pan pao pap par pas pka pkn pko pkp pkr pks pn- pna pnk pnn pno pnp pnr pns poa pok pon poo pop por pos ppa ppk ppn ppo ppp ppr pps pra prk prn pro prp prr prs ps- psa psk psn pso psp psr pss ra- raa rak ran rao rap rar ras rkk rko rkp rks rna rnn rno rnp rnr rns roa rok ron roo rop ror ros rpa rpk rpn rpo rpp rpr rps rra rrk rrn rrp rrr rrs rsa rsk rsn rso rsp rsr rss saa sak san sao sap sar sas sk- ska skk sko skp skr sks sna snk snn sno snp snr sns soa sok son soo sop sor sos spa spk spn spo spp spr sps sr- sra srk srn sro srp srr srs ss- ssa ssk ssn sso ssp ssr sss