a-a a-i aaa aai aan aao aap ai- aia aii ain aio aip an- ana ani ann ano anp aoa aoi aon aoo aop ap- apa api apn apo app ia- iaa iai ian iao iap iia iii iin iio iip in- ina ini inn ino inp io- ioa ioi ion ioo iop ipa ipi ipn ipo ipp n-i naa nai nan nao nap nia nii nin nio nip nna nni nnn nno nnp no- noa noi non noo nop npa npi npn npo npp o-i oaa oai oan oao oap oia oii oin oio oip on- ona oni onn ono onp oo- ooa ooi oon ooo oop op- opa opi opn opo opp p-p paa pai pan pao pap pia pii pin pio pip pn- pna pni pnn pno pnp poa poi pon poo pop ppa ppi ppn ppo ppp