a-a a-b a-i a-t aaa aab aad aae aai aao aas aat ab- aba abb abd abe abi abo abs abt ad- ada adb add ade adi ado ads adt aea aeb aed aee aei aeo aes aet ai- aia aib aid aie aii aio ais ait aoa aob aod aoe aoi aoo aos aot as- asa asb asd ase asi aso ass ast at- ata atb atd ate ati ato ats att baa bab bad bae bai bao bas bat bba bbb bbd bbe bbi bbo bbs bbt bda bdb bdd bde bdi bdo bds bdt be- bea beb bed bee bei beo bes bet bi- bia bib bid bie bii bio bis bit boa bob bod boe boi boo bos bot bsa bsb bsd bse bsi bso bss bst bta btb btd bte bti bto bts btt daa dab dad dae dai dao das dat dba dbb dbd dbe dbi dbo dbs dbt dda ddb ddd dde ddi ddo dds ddt de- dea deb ded dee dei deo des det di- dia dib did die dii dio dis dit doa dob dod doe doi doo dos dot dsa dsb dsd dse dsi dso dss dst dta dtb dtd dte dti dto dts dtt eaa eab ead eae eai eao eas eat eba ebb ebd ebe ebi ebo ebs ebt ed- eda edb edd ede edi edo eds edt eea eeb eed eee eeo ees eet eia eib eid eie eii eio eis eit eo- eoa eob eod eoe eoi eoo eos eot es- esa esb esd ese esi eso ess est eta etb etd ete eti eto ets ett i-d ia- iaa iab iad iae iai iao ias iat iba ibb ibd ibe ibi ibo ibs ibt ida idb idd ide idi ido ids idt ie- iea ied iee iei ies iet iia iib iid iie iii iio iis iit io- ioa iob iod ioe ioi ioo ios iot is- isa isb isd ise isi iso iss ist ita itb itd ite iti ito its itt o-i oaa oab oad oae oai oao oas oat ob- oba obb obd obe obi obo obs obt oda odb odd ode odi odo ods odt oea oeb oed oee oei oeo oes oet oia oib oid oie oii oio ois oit oo- ooa oob ood ooi ooo oos oot os- osa osb osd ose osi oso oss ost ot- ota otb otd ote oti oto ots ott saa sab sad sae sai sao sas sat sba sbb sbd sbe sbi sbo sbs sbt sda sdb sdd sde sdi sdo sds sdt se- sea seb sed see sei seo ses set sia sib sid sie sii sio sis sit soa sob sod soe soi soo sos sot ss- ssa ssb ssd sse ssi sso sss sst sta stb std ste sti sto sts stt taa tab tad tae tai tao tas tat tba tbb tbd tbe tbi tbo tbs tbt tda tdb tdd tde tdi tdo tds tdt te- tea teb ted tee tei teo tes tet tia tib tid tie tii tio tis tit to- toa tob tod toe toi too tos tot tsa tsb tsd tse tsi tso tss tst tta ttb ttd tte tti tto tts ttt