a-a a-i aaa aai aan aao aap aas ai- aia aii ain aio aip ais an- ana ani ann ano anp ans aoa aoi aon aoo aop aos ap- apa api apn apo app aps as- asa asi asn aso asp ass ia- iaa iai ian iao iap ias iia iii iin iio iip iis in- ina ini inn ino inp ins io- ioa ioi ion ioo iop ios ipa ipi ipn ipo ipp ips is- isa isi isn iso isp iss n-i naa nai nan nao nap nas nia nii nin nio nip nis nna nni nnn nno nnp nns no- noa noi non noo nop nos npa npi npn npo npp nps nsa nsi nsn nso nsp nss o-i oaa oai oan oao oap oas oia oii oin oio oip ois on- ona oni onn ono onp ons oo- ooa ooi oon ooo oop oos op- opa opi opn opo opp ops os- osa osi osn oso osp oss p-p paa pai pan pao pap pas pia pii pin pio pip pis pn- pna pni pnn pno pnp pns poa poi pon poo pop pos ppa ppi ppn ppo ppp pps ps- psa psi psn pso psp pss saa sai san sao sap sas sia sii sin sio sip sis sna sni snn sno snp sns soa soi son soo sop sos spa spi spn spo spp sps ss- ssa ssi ssn sso ssp sss