a-a a-b a-i aaa aab aad aai aan aas ab- aba abb abd abi abn abs ad- ada adb add adi adn ads ai- aia aib aid aii ain ais an- ana anb and ani ann ans as- asa asb asd asi asn ass baa bab bad bai ban bas bba bbb bbd bbi bbn bbs bda bdb bdd bdi bds bi- bia bib bid bii bin bis bna bnb bnd bni bnn bns bsa bsb bsd bsi bsn bss daa dab dad dai dan das dba dbb dbd dbi dbn dbs dda ddb ddd ddi ddn dds di- dia dib did dii din dis dna dnb dnd dni dnn dns dsa dsb dsd dsi dsn dss i-d ia- iaa iab iad iai ian ias iba ibb ibd ibi ibn ibs ida idb idd idi idn ids iia iib iid iii iin iis in- ina inb ind ini inn ins is- isa isb isd isi isn iss n-i naa nab nad nai nan nas nba nbb nbd nbi nbn nbs nda ndb ndd ndi ndn nds nia nib nid nii nin nis nna nnb nni nnn nns nsa nsb nsd nsi nsn nss saa sab sad sai san sas sba sbb sbd sbi sbn sbs sda sdb sdd sdi sdn sds sia sib sid sii sin sis sna snb snd sni snn sns ss- ssa ssb ssd ssi ssn sss