a-a a-i a-t aaa aaf aai aan aao aap aas aat aax af- afa aff afi afn afo afp afs aft afx ai- aia aif aii ain aio aip ais ait aix an- ana anf ani ann ano anp ans ant anx aoa aof aoi aon aoo aop aos aot aox ap- apa apf api apn apo app aps apt apx as- asa asf asi asn aso asp ass ast asx at- ata atf ati atn ato atp ats att atx ax- axa axi axn axo axp axs axt axx faa faf fai fan fao fap fas fat fax ffa fff ffi ffn ffo ffp ffs fft ffx fia fif fii fin fip fis fit fix fna fnf fni fnn fnp fns fnt fnx foa fof foi fon foo fop fos fot fox fpa fpi fpn fpo fpp fps fpt fpx fsa fsf fsi fsn fso fsp fss fst fsx fta ftf fti ftn fto ftp fts ftt ftx fxi fxp fxs fxt fxx i-f ia- iaa iaf iai ian iao iap ias iat ifa iff ifi ifn ifo ifp ifs ift ifx iia iif iii iin iio iip iis iit iix in- ina inf ini inn ino inp ins int inx io- ioa iof ioi ion ioo iop ios iot ipa ipf ipi ipn ipo ipp ips ipt ipx is- isa isf isi isn iso isp iss ist ita itf iti itn ito itp its itt itx ixi ixn n-i naa naf nai nan nao nap nas nat nax nfa nff nfi nfn nfo nfp nfs nft nia nif nii nin nio nip nis nit nix nna nnf nni nnn nno nnp nns nnt no- noa nof noi non noo nop nos not nox npa npf npi npn npo npp nps npt nsa nsf nsi nsn nso nsp nss nst nsx nta ntf nti ntn nto ntp nts ntt ntx nxt o-i oaa oaf oai oan oao oap oas oat oax of- ofa off ofi ofn ofo ofp ofs oft ofx oia oif oii oin oio oip ois oit on- ona onf oni onn ono onp ons ont onx oo- ooa oof ooi oon ooo oop oos oot oox op- opa opf opi opn opo opp ops opt opx os- osa osf osi osn oso osp oss ost osx ot- ota otf oti otn oto otp ots ott ox- oxa oxf oxi oxn oxo oxt oxx p-p paa paf pai pan pao pap pas pat pax pfa pff pfi pfn pfo pfp pfs pft pfx pia pif pii pin pio pip pis pit pix pn- pna pnf pni pnn pno pnp pns pnt pnx poa pof poi pon poo pop pos pot pox ppa ppf ppi ppn ppo ppp pps ppt ppx ps- psa psf psi psn pso psp pss pst psx pt- pta ptf pti ptn pto ptp pts ptt ptx pxs pxt saa saf sai san sao sap sas sat sax sfa sff sfi sfn sfo sfp sfs sft sfx sia sif sii sin sio sip sis sit six sna snf sni snn sno snp sns snt soa sof soi son soo sop sos sot sox spa spf spi spn spo spp sps spt spx ss- ssa ssf ssi ssn sso ssp sss sst ssx sta stf sti stn sto stp sts stt stx sxi sxn sxs sxt t-x taa taf tai tan tao tap tas tat tax tfa tff tfi tfn tfo tfp tfs tft tfx tia tif tii tin tio tip tis tit tix tna tnf tni tnn tno tnp tns tnt tnx to- toa tof toi ton too top tos tot tox tpa tpf tpi tpn tpo tpp tps tpt tpx tsa tsf tsi tsn tso tsp tss tst tsx tta ttf tti ttn tto ttp tts ttt ttx txf txi txn txs txt xaa xaf xan xap xas xat xfa xfn xfs xft xfx xia xii xin xio xis xit xix xna xno xns xoa xof xoi xon xoo xop xos xot xox xpa xpf xpn xpo xpp xps xpt xsa xsi xsp xss xst xtf xti xtp xts xtx xxi xxo xxp xxx