a-a a-b a-i aaa aab aad aai aak aan aas ab- aba abb abd abi abk abn abs ad- ada adb add adi adk adn ads ai- aia aib aid aii aik ain ais aka akb akd aki akk akn aks an- ana anb and ani ank ann ans as- asa asb asd asi ask asn ass baa bab bad bai bak ban bas bba bbb bbd bbi bbk bbn bbs bda bdb bdd bdi bdk bds bi- bia bib bid bii bik bin bis bka bkb bkk bkn bks bna bnb bnd bni bnk bnn bns bsa bsb bsd bsi bsk bsn bss daa dab dad dai dak dan das dba dbb dbd dbi dbk dbn dbs dda ddb ddd ddi ddk ddn dds di- dia dib did dii dik din dis dka dkb dki dkk dks dna dnb dnd dni dnk dnn dns dsa dsb dsd dsi dsk dsn dss i-d ia- iaa iab iad iai ian ias iba ibb ibd ibi ibk ibn ibs ida idb idd idi idk idn ids iia iib iid iii iin iis ika ikb iki ikk iks in- ina inb ind ini ink inn ins is- isa isb isd isi isk isn iss ka- kaa kab kad kai kak kan kas kba kbb kbd kbi kbk kbn kbs kda kdb kdk kds kia kib kid kii kik kin kis kkb kki kkk kkn kks kn- kna knd kni knk knn ksa ksb ksd ksi ksk ksn kss n-i naa nab nad nai nak nan nas nba nbb nbd nbi nbk nbn nbs nda ndb ndd ndi ndk ndn nds nia nib nid nii nik nin nis nka nki nkk nkn nks nna nnb nni nnk nnn nns nsa nsb nsd nsi nsk nsn nss saa sab sad sai sak san sas sba sbb sbd sbi sbk sbn sbs sda sdb sdd sdi sdk sdn sds sia sib sid sii sik sin sis sk- ska skb skd ski skk sks sna snb snd sni snk snn sns ss- ssa ssb ssd ssi ssk ssn sss