a-a a-i aaa aai aan aap aax ai- aia aii ain aip aix an- ana ani ann anp anx ap- apa api apn app apx ax- axa axi axn axp axx ia- iaa iai ian iap iia iii iin iip iix in- ina ini inn inp inx ipa ipi ipn ipp ipx ixi ixn n-i naa nai nan nap nax nia nii nin nip nix nna nni nnn nnp npa npi npn npp p-p paa pai pan pap pax pia pii pin pip pix pn- pna pni pnn pnp pnx ppa ppi ppn ppp ppx xaa xan xap xia xii xin xix xna xpa xpn xpp xxi xxp xxx