a-a a-b a-i a-t aaa aab aad aae aai aan aas aat ab- aba abb abd abe abi abn abs abt ad- ada adb add ade adi adn ads adt aea aeb aed aee aei aen aes aet ai- aia aib aid aie aii ain ais ait an- ana anb and ane ani ann ans ant as- asa asb asd ase asi asn ass ast at- ata atb atd ate ati atn ats att baa bab bad bae bai ban bas bat bba bbb bbd bbe bbi bbn bbs bbt bda bdb bdd bde bdi bds bdt be- bea beb bed bee bei ben bes bet bi- bia bib bid bie bii bin bis bit bna bnb bnd bne bni bnn bns bnt bsa bsb bsd bse bsi bsn bss bst bta btb btd bte bti btn bts btt daa dab dad dae dai dan das dat dba dbb dbd dbe dbi dbn dbs dbt dda ddb ddd dde ddi ddn dds ddt de- dea deb ded dee dei den des det di- dia dib did die dii din dis dit dna dnb dnd dne dni dnn dns dnt dsa dsb dsd dse dsi dsn dss dst dta dtb dtd dte dti dtn dts dtt eaa eab ead eae eai ean eas eat eba ebb ebd ebe ebi ebn ebs ebt ed- eda edb edd ede edi edn eds edt eea eeb eed eee een ees eet eia eib eid eie eii ein eis eit en- ena enb end ene eni enn ens ent es- esa esb esd ese esi esn ess est eta etb etd ete eti etn ets ett i-d ia- iaa iab iad iae iai ian ias iat iba ibb ibd ibe ibi ibn ibs ibt ida idb idd ide idi idn ids idt ie- iea ied iee iei ien ies iet iia iib iid iie iii iin iis iit in- ina inb ind ine ini inn ins int is- isa isb isd ise isi isn iss ist ita itb itd ite iti itn its itt n-i naa nab nad nae nai nan nas nat nba nbb nbd nbe nbi nbn nbs nbt nda ndb ndd nde ndi ndn nds ndt ne- nea neb ned nee nei nen nes net nia nib nid nie nii nin nis nit nna nnb nne nni nnn nns nnt nsa nsb nsd nse nsi nsn nss nst nta ntb ntd nte nti ntn nts ntt saa sab sad sae sai san sas sat sba sbb sbd sbe sbi sbn sbs sbt sda sdb sdd sde sdi sdn sds sdt se- sea seb sed see sei sen ses set sia sib sid sie sii sin sis sit sna snb snd sne sni snn sns snt ss- ssa ssb ssd sse ssi ssn sss sst sta stb std ste sti stn sts stt taa tab tad tae tai tan tas tat tba tbb tbd tbe tbi tbn tbs tbt tda tdb tdd tde tdi tdn tds tdt te- tea teb ted tee tei ten tes tet tia tib tid tie tii tin tis tit tna tnb tnd tne tni tnn tns tnt tsa tsb tsd tse tsi tsn tss tst tta ttb ttd tte tti ttn tts ttt