a-a a-i aaa aaf aai aan aao aap aas aax af- afa aff afi afn afo afp afs afx ai- aia aif aii ain aio aip ais aix an- ana anf ani ann ano anp ans anx aoa aof aoi aon aoo aop aos aox ap- apa apf api apn apo app aps apx as- asa asf asi asn aso asp ass asx ax- axa axi axn axo axp axs axx faa faf fai fan fao fap fas fax ffa fff ffi ffn ffo ffp ffs ffx fia fif fii fin fip fis fix fna fnf fni fnn fnp fns fnx foa fof foi fon foo fop fos fox fpa fpi fpn fpo fpp fps fpx fsa fsf fsi fsn fso fsp fss fsx fxi fxp fxs fxx i-f ia- iaa iaf iai ian iao iap ias ifa iff ifi ifn ifo ifp ifs ifx iia iif iii iin iio iip iis iix in- ina inf ini inn ino inp ins inx io- ioa iof ioi ion ioo iop ios ipa ipf ipi ipn ipo ipp ips ipx is- isa isf isi isn iso isp iss ixi ixn n-i naa naf nai nan nao nap nas nax nfa nff nfi nfn nfo nfp nfs nia nif nii nin nio nip nis nix nna nnf nni nnn nno nnp nns no- noa nof noi non noo nop nos nox npa npf npi npn npo npp nps nsa nsf nsi nsn nso nsp nss nsx o-i oaa oaf oai oan oao oap oas oax of- ofa off ofi ofn ofo ofp ofs ofx oia oif oii oin oio oip ois on- ona onf oni onn ono onp ons onx oo- ooa oof ooi oon ooo oop oos oox op- opa opf opi opn opo opp ops opx os- osa osf osi osn oso osp oss osx ox- oxa oxf oxi oxn oxo oxx p-p paa paf pai pan pao pap pas pax pfa pff pfi pfn pfo pfp pfs pfx pia pif pii pin pio pip pis pix pn- pna pnf pni pnn pno pnp pns pnx poa pof poi pon poo pop pos pox ppa ppf ppi ppn ppo ppp pps ppx ps- psa psf psi psn pso psp pss psx pxs saa saf sai san sao sap sas sax sfa sff sfi sfn sfo sfp sfs sfx sia sif sii sin sio sip sis six sna snf sni snn sno snp sns soa sof soi son soo sop sos sox spa spf spi spn spo spp sps spx ss- ssa ssf ssi ssn sso ssp sss ssx sxi sxn sxs xaa xaf xan xap xas xfa xfn xfs xfx xia xii xin xio xis xix xna xno xns xoa xof xoi xon xoo xop xos xox xpa xpf xpn xpo xpp xps xsa xsi xsp xss xxi xxo xxp xxx