a-a a-b a-i a-t aaa aab aad aai aan aar aas aat ab- aba abb abd abi abn abr abs abt ad- ada adb add adi adn adr ads adt ai- aia aib aid aii ain air ais ait an- ana anb and ani ann anr ans ant ar- ara arb ard ari arn arr ars art as- asa asb asd asi asn asr ass ast at- ata atb atd ati atn atr ats att baa bab bad bai ban bar bas bat bba bbb bbd bbi bbn bbr bbs bbt bda bdb bdd bdi bdr bds bdt bi- bia bib bid bii bin bir bis bit bna bnb bnd bni bnn bnr bns bnt bra brb brd bri brn brr brs brt bsa bsb bsd bsi bsn bsr bss bst bta btb btd bti btn btr bts btt daa dab dad dai dan dar das dat dba dbb dbd dbi dbn dbr dbs dbt dda ddb ddd ddi ddn ddr dds ddt di- dia dib did dii din dir dis dit dna dnb dnd dni dnn dnr dns dnt dra drb drd dri drn drr drs drt dsa dsb dsd dsi dsn dsr dss dst dta dtb dtd dti dtn dtr dts dtt i-d ia- iaa iab iad iai ian iar ias iat iba ibb ibd ibi ibn ibr ibs ibt ida idb idd idi idn idr ids idt iia iib iid iii iin iir iis iit in- ina inb ind ini inn inr ins int ir- ira irb ird iri irn irr irs irt is- isa isb isd isi isn isr iss ist ita itb itd iti itn its itt n-i naa nab nad nai nan nar nas nat nba nbb nbd nbi nbn nbr nbs nbt nda ndb ndd ndi ndn ndr nds ndt nia nib nid nii nin nir nis nit nna nnb nni nnn nns nnt nra nrb nrd nri nrn nrr nrs nrt nsa nsb nsd nsi nsn nsr nss nst nta ntb ntd nti ntn ntr nts ntt ra- raa rab rad rai ran rar ras rat rba rbb rbd rbi rbn rbr rbs rbt rda rdb rdd rdi rdn rdr rds rdt ria rib rid rii rin rir ris rit rna rnb rnd rni rnn rnr rns rnt rra rrb rrd rri rrn rrr rrs rrt rsa rsb rsd rsi rsn rsr rss rst rta rtb rtd rti rtn rtr rts rtt saa sab sad sai san sar sas sat sba sbb sbd sbi sbn sbr sbs sbt sda sdb sdd sdi sdn sdr sds sdt sia sib sid sii sin sir sis sit sna snb snd sni snn snr sns snt sr- sra srb srd sri srn srr srs srt ss- ssa ssb ssd ssi ssn ssr sss sst sta stb std sti stn str sts stt taa tab tad tai tan tar tas tat tba tbb tbd tbi tbn tbr tbs tbt tda tdb tdd tdi tdn tdr tds tdt tia tib tid tii tin tir tis tit tna tnb tnd tni tnn tnr tns tnt tra trb trd tri trn trr trs trt tsa tsb tsd tsi tsn tsr tss tst tta ttb ttd tti ttn ttr tts ttt