a-a a-b a-i aaa aab aad aai aak aan aar aas ab- aba abb abd abi abk abn abr abs ad- ada adb add adi adk adn adr ads ai- aia aib aid aii aik ain air ais aka akb akd aki akk akn akr aks an- ana anb and ani ank ann anr ans ar- ara arb ard ari ark arn arr ars as- asa asb asd asi ask asn asr ass baa bab bad bai bak ban bar bas bba bbb bbd bbi bbk bbn bbr bbs bda bdb bdd bdi bdk bdr bds bi- bia bib bid bii bik bin bir bis bka bkb bkk bkn bkr bks bna bnb bnd bni bnk bnn bnr bns bra brb brd bri brk brn brr brs bsa bsb bsd bsi bsk bsn bsr bss daa dab dad dai dak dan dar das dba dbb dbd dbi dbk dbn dbr dbs dda ddb ddd ddi ddk ddn ddr dds di- dia dib did dii dik din dir dis dka dkb dki dkk dkr dks dna dnb dnd dni dnk dnn dnr dns dra drb drd dri drk drn drr drs dsa dsb dsd dsi dsk dsn dsr dss i-d ia- iaa iab iad iai ian iar ias iba ibb ibd ibi ibk ibn ibr ibs ida idb idd idi idk idn idr ids iia iib iid iii iin iir iis ika ikb iki ikk ikr iks in- ina inb ind ini ink inn inr ins ir- ira irb ird iri irk irn irr irs is- isa isb isd isi isk isn isr iss ka- kaa kab kad kai kak kan kar kas kba kbb kbd kbi kbk kbn kbr kbs kda kdb kdk kdr kds kia kib kid kii kik kin kir kis kkb kki kkk kkn kkr kks kn- kna knd kni knk knn knr kra krd kri krk krn krr krs ksa ksb ksd ksi ksk ksn ksr kss n-i naa nab nad nai nak nan nar nas nba nbb nbd nbi nbk nbn nbr nbs nda ndb ndd ndi ndk ndn ndr nds nia nib nid nii nik nin nir nis nka nki nkk nkn nkr nks nna nnb nni nnk nnn nns nra nrb nrd nri nrk nrn nrr nrs nsa nsb nsd nsi nsk nsn nsr nss ra- raa rab rad rai rak ran rar ras rba rbb rbd rbi rbk rbn rbr rbs rda rdb rdd rdi rdn rdr rds ria rib rid rii rik rin rir ris rkb rkk rks rna rnb rnd rni rnn rnr rns rra rrb rrd rri rrk rrn rrr rrs rsa rsb rsd rsi rsk rsn rsr rss saa sab sad sai sak san sar sas sba sbb sbd sbi sbk sbn sbr sbs sda sdb sdd sdi sdk sdn sdr sds sia sib sid sii sik sin sir sis sk- ska skb skd ski skk skr sks sna snb snd sni snk snn snr sns sr- sra srb srd sri srk srn srr srs ss- ssa ssb ssd ssi ssk ssn ssr sss