a-a a-i aaa aai aan aar aas ai- aia aii ain air ais an- ana ani ann anr ans ar- ara ari arn arr ars as- asa asi asn asr ass ia- iaa iai ian iar ias iia iii iin iir iis in- ina ini inn inr ins ir- ira iri irn irr irs is- isa isi isn isr iss n-i naa nai nan nar nas nia nii nin nir nis nna nni nnn nns nra nri nrn nrr nrs nsa nsi nsn nsr nss ra- raa rai ran rar ras ria rii rin rir ris rna rni rnn rnr rns rra rri rrn rrr rrs rsa rsi rsn rsr rss saa sai san sar sas sia sii sin sir sis sna sni snn snr sns sr- sra sri srn srr srs ss- ssa ssi ssn ssr sss