a-a a-i aaa aai aak aan aao aap aar ai- aia aii aik ain aio aip air aka aki akk akn ako akp akr an- ana ani ank ann ano anp anr aoa aoi aok aon aoo aop aor ap- apa api apk apn apo app apr ar- ara ari ark arn aro arp arr ia- iaa iai ian iao iap iar iia iii iin iio iip iir ika iki ikk iko ikr in- ina ini ink inn ino inp inr io- ioa ioi ion ioo iop ior ipa ipi ipn ipo ipp ipr ir- ira iri irk irn iro irp irr ka- kaa kai kak kan kao kap kar kia kii kik kin kio kip kir kki kkk kkn kkp kkr kn- kna kni knk knn kno knp knr koa koi kok kon koo kop kor kpa kpi kpk kpn kpo kpp kpr kra kri krk krn kro krp krr n-i naa nai nak nan nao nap nar nia nii nik nin nio nip nir nka nki nkk nkn nko nkp nkr nna nni nnk nnn nno nnp no- noa noi nok non noo nop nor npa npi npn npo npp npr nra nri nrk nrn nro nrp nrr o-i oaa oai oak oan oao oap oar oia oii oik oin oio oip oir oka oki okk oko okp okr on- ona oni onk onn ono onp onr oo- ooa ooi ook oon ooo oop oor op- opa opi opk opn opo opp opr or- ora ori ork orn oro orp orr p-p paa pai pak pan pao pap par pia pii pik pin pio pip pir pka pki pkn pko pkp pkr pn- pna pni pnk pnn pno pnp pnr poa poi pok pon poo pop por ppa ppi ppk ppn ppo ppp ppr pra pri prk prn pro prp prr ra- raa rai rak ran rao rap rar ria rii rik rin rio rip rir rkk rko rkp rna rni rnn rno rnp rnr roa roi rok ron roo rop ror rpa rpi rpk rpn rpo rpp rpr rra rri rrk rrn rrp rrr