a-a a-b a-i a-t aaa aab aad aai aan aao aar aas aat ab- aba abb abd abi abn abo abr abs abt ad- ada adb add adi adn ado adr ads adt ai- aia aib aid aii ain aio air ais ait an- ana anb and ani ann ano anr ans ant aoa aob aod aoi aon aoo aor aos aot ar- ara arb ard ari arn aro arr ars art as- asa asb asd asi asn aso asr ass ast at- ata atb atd ati atn ato atr ats att baa bab bad bai ban bao bar bas bat bba bbb bbd bbi bbn bbo bbr bbs bbt bda bdb bdd bdi bdo bdr bds bdt bi- bia bib bid bii bin bio bir bis bit bna bnb bnd bni bnn bno bnr bns bnt boa bob bod boi bon boo bor bos bot bra brb brd bri brn bro brr brs brt bsa bsb bsd bsi bsn bso bsr bss bst bta btb btd bti btn bto btr bts btt daa dab dad dai dan dao dar das dat dba dbb dbd dbi dbn dbo dbr dbs dbt dda ddb ddd ddi ddn ddo ddr dds ddt di- dia dib did dii din dio dir dis dit dna dnb dnd dni dnn dno dnr dns dnt doa dob dod doi don doo dor dos dot dra drb drd dri drn dro drr drs drt dsa dsb dsd dsi dsn dso dsr dss dst dta dtb dtd dti dtn dto dtr dts dtt i-d ia- iaa iab iad iai ian iao iar ias iat iba ibb ibd ibi ibn ibo ibr ibs ibt ida idb idd idi idn ido idr ids idt iia iib iid iii iin iio iir iis iit in- ina inb ind ini inn ino inr ins int io- ioa iob iod ioi ion ioo ior ios iot ir- ira irb ird iri irn iro irr irs irt is- isa isb isd isi isn iso isr iss ist ita itb itd iti itn ito its itt n-i naa nab nad nai nan nao nar nas nat nba nbb nbd nbi nbn nbo nbr nbs nbt nda ndb ndd ndi ndn ndo ndr nds ndt nia nib nid nii nin nio nir nis nit nna nnb nni nnn nno nns nnt no- noa nob nod noi non noo nor nos not nra nrb nrd nri nrn nro nrr nrs nrt nsa nsb nsd nsi nsn nso nsr nss nst nta ntb ntd nti ntn nto ntr nts ntt o-i oaa oab oad oai oan oao oar oas oat ob- oba obb obd obi obn obo obr obs obt oda odb odd odi odn odo odr ods odt oia oib oid oii oin oio oir ois oit on- ona onb ond oni onn ono onr ons ont oo- ooa oob ood ooi oon ooo oor oos oot or- ora orb ord ori orn oro orr ors ort os- osa osb osd osi osn oso osr oss ost ot- ota otb otd oti otn oto otr ots ott ra- raa rab rad rai ran rao rar ras rat rba rbb rbd rbi rbn rbo rbr rbs rbt rda rdb rdd rdi rdn rdo rdr rds rdt ria rib rid rii rin rio rir ris rit rna rnb rnd rni rnn rno rnr rns rnt roa rob rod roi ron roo ror ros rot rra rrb rrd rri rrn rrr rrs rrt rsa rsb rsd rsi rsn rso rsr rss rst rta rtb rtd rti rtn rto rtr rts rtt saa sab sad sai san sao sar sas sat sba sbb sbd sbi sbn sbo sbr sbs sbt sda sdb sdd sdi sdn sdo sdr sds sdt sia sib sid sii sin sio sir sis sit sna snb snd sni snn sno snr sns snt soa sob sod soi son soo sor sos sot sr- sra srb srd sri srn sro srr srs srt ss- ssa ssb ssd ssi ssn sso ssr sss sst sta stb std sti stn sto str sts stt taa tab tad tai tan tao tar tas tat tba tbb tbd tbi tbn tbo tbr tbs tbt tda tdb tdd tdi tdn tdo tdr tds tdt tia tib tid tii tin tio tir tis tit tna tnb tnd tni tnn tno tnr tns tnt to- toa tob tod toi ton too tor tos tot tra trb trd tri trn tro trr trs trt tsa tsb tsd tsi tsn tso tsr tss tst tta ttb ttd tti ttn tto ttr tts ttt