a-a a-i aaa aai aan aap aar aas ai- aia aii ain aip air ais an- ana ani ann anp anr ans ap- apa api apn app apr aps ar- ara ari arn arp arr ars as- asa asi asn asp asr ass ia- iaa iai ian iap iar ias iia iii iin iip iir iis in- ina ini inn inp inr ins ipa ipi ipn ipp ipr ips ir- ira iri irn irp irr irs is- isa isi isn isp isr iss n-i naa nai nan nap nar nas nia nii nin nip nir nis nna nni nnn nnp nns npa npi npn npp npr nps nra nri nrn nrp nrr nrs nsa nsi nsn nsp nsr nss p-p paa pai pan pap par pas pia pii pin pip pir pis pn- pna pni pnn pnp pnr pns ppa ppi ppn ppp ppr pps pra pri prn prp prr prs ps- psa psi psn psp psr pss ra- raa rai ran rap rar ras ria rii rin rip rir ris rna rni rnn rnp rnr rns rpa rpi rpn rpp rpr rps rra rri rrn rrp rrr rrs rsa rsi rsn rsp rsr rss saa sai san sap sar sas sia sii sin sip sir sis sna sni snn snp snr sns spa spi spn spp spr sps sr- sra sri srn srp srr srs ss- ssa ssi ssn ssp ssr sss