a-a a-i aaa aai aan aap aar ai- aia aii ain aip air an- ana ani ann anp anr ap- apa api apn app apr ar- ara ari arn arp arr ia- iaa iai ian iap iar iia iii iin iip iir in- ina ini inn inp inr ipa ipi ipn ipp ipr ir- ira iri irn irp irr n-i naa nai nan nap nar nia nii nin nip nir nna nni nnn nnp npa npi npn npp npr nra nri nrn nrp nrr p-p paa pai pan pap par pia pii pin pip pir pn- pna pni pnn pnp pnr ppa ppi ppn ppp ppr pra pri prn prp prr ra- raa rai ran rap rar ria rii rin rip rir rna rni rnn rnp rnr rpa rpi rpn rpp rpr rra rri rrn rrp rrr