a-a aaa aak aan aao aap aas aka akk akn ako akp aks an- ana ank ann ano anp ans aoa aok aon aoo aop aos ap- apa apk apn apo app aps as- asa ask asn aso asp ass ka- kaa kak kan kao kap kas kkk kkn kkp kks kn- kna knk knn kno knp koa kok kon koo kop kos kpa kpk kpn kpo kpp kps ksa ksk ksn kso ksp kss naa nak nan nao nap nas nka nkk nkn nko nkp nks nna nnk nnn nno nnp nns no- noa nok non noo nop nos npa npn npo npp nps nsa nsk nsn nso nsp nss oaa oak oan oao oap oas oka okk oko okp oks on- ona onk onn ono onp ons oo- ooa ook oon ooo oop oos op- opa opk opn opo opp ops os- osa osk osn oso osp oss p-p paa pak pan pao pap pas pka pkn pko pkp pks pn- pna pnk pnn pno pnp pns poa pok pon poo pop pos ppa ppk ppn ppo ppp pps ps- psa psk psn pso psp pss saa sak san sao sap sas sk- ska skk sko skp sks sna snk snn sno snp sns soa sok son soo sop sos spa spk spn spo spp sps ss- ssa ssk ssn sso ssp sss