a-a a-i a-t aaa aaf aai aan aao aar aas aat aax af- afa aff afi afn afo afr afs aft afx ai- aia aif aii ain aio air ais ait aix an- ana anf ani ann ano anr ans ant anx aoa aof aoi aon aoo aor aos aot aox ar- ara arf ari arn aro arr ars art arx as- asa asf asi asn aso asr ass ast asx at- ata atf ati atn ato atr ats att atx ax- axa axi axn axo axr axs axt axx faa faf fai fan fao far fas fat fax ffa fff ffi ffn ffo ffr ffs fft ffx fia fif fii fin fir fis fit fix fna fnf fni fnn fnr fns fnt fnx foa fof foi fon foo for fos fot fox fra frf fri frn fro frr frs frt fsa fsf fsi fsn fso fsr fss fst fsx fta ftf fti ftn fto ftr fts ftt ftx fxi fxr fxs fxt fxx i-f ia- iaa iaf iai ian iao iar ias iat ifa iff ifi ifn ifo ifr ifs ift ifx iia iif iii iin iio iir iis iit iix in- ina inf ini inn ino inr ins int inx io- ioa iof ioi ion ioo ior ios iot ir- ira irf iri irn iro irr irs irt irx is- isa isf isi isn iso isr iss ist ita itf iti itn ito its itt itx ixi ixn n-i naa naf nai nan nao nar nas nat nax nfa nff nfi nfn nfo nfr nfs nft nia nif nii nin nio nir nis nit nix nna nnf nni nnn nno nns nnt no- noa nof noi non noo nor nos not nox nra nrf nri nrn nro nrr nrs nrt nrx nsa nsf nsi nsn nso nsr nss nst nsx nta ntf nti ntn nto ntr nts ntt ntx nxt o-i oaa oaf oai oan oao oar oas oat oax of- ofa off ofi ofn ofo ofr ofs oft ofx oia oif oii oin oio oir ois oit on- ona onf oni onn ono onr ons ont onx oo- ooa oof ooi oon ooo oor oos oot oox or- ora orf ori orn oro orr ors ort orx os- osa osf osi osn oso osr oss ost osx ot- ota otf oti otn oto otr ots ott ox- oxa oxf oxi oxn oxo oxt oxx ra- raa raf rai ran rao rar ras rat rax rfa rff rfi rfn rfo rfr rfs rft ria rif rii rin rio rir ris rit rix rna rni rnn rno rnr rns rnt roa rof roi ron roo ror ros rot rox rra rrf rri rrn rrr rrs rrt rsa rsf rsi rsn rso rsr rss rst rsx rta rtf rti rtn rto rtr rts rtt rtx rxr rxs saa saf sai san sao sar sas sat sax sfa sff sfi sfn sfo sfr sfs sft sfx sia sif sii sin sio sir sis sit six sna snf sni snn sno snr sns snt soa sof soi son soo sor sos sot sox sr- sra srf sri srn sro srr srs srt srx ss- ssa ssf ssi ssn sso ssr sss sst ssx sta stf sti stn sto str sts stt stx sxi sxn sxs sxt t-x taa taf tai tan tao tar tas tat tax tfa tff tfi tfn tfo tfr tfs tft tfx tia tif tii tin tio tir tis tit tix tna tnf tni tnn tno tnr tns tnt tnx to- toa tof toi ton too tor tos tot tox tra trf tri trn tro trr trs trt trx tsa tsf tsi tsn tso tsr tss tst tsx tta ttf tti ttn tto ttr tts ttt ttx txf txi txn txs txt xaa xaf xan xar xas xat xfa xfn xfs xft xfx xia xii xin xio xis xit xix xna xno xns xoa xof xoi xon xoo xor xos xot xox xrf xrt xrx xsa xsi xss xst xtf xti xtr xts xtx xxi xxo xxx