a-a aaa aak aan aap aar aka akk akn akp akr an- ana ank ann anp anr ap- apa apk apn app apr ar- ara ark arn arp arr ka- kaa kak kan kap kar kkk kkn kkp kkr kn- kna knk knn knp knr kpa kpk kpn kpp kpr kra krk krn krp krr naa nak nan nap nar nka nkk nkn nkp nkr nna nnk nnn nnp npa npn npp npr nra nrk nrn nrp nrr p-p paa pak pan pap par pka pkn pkp pkr pn- pna pnk pnn pnp pnr ppa ppk ppn ppp ppr pra prk prn prp prr ra- raa rak ran rap rar rkk rkp rna rnn rnp rnr rpa rpk rpn rpp rpr rra rrk rrn rrp rrr