bbb bbd bbi bbn bbs bdb bdd bdi bds bi- bib bid bii bin bis bnb bnd bni bnn bns bsb bsd bsi bsn bss dbb dbd dbi dbn dbs ddb ddd ddi ddn dds di- dib did dii din dis dnb dnd dni dnn dns dsb dsd dsi dsn dss i-d ibb ibd ibi ibn ibs idb idd idi idn ids iib iid iii iin iis in- inb ind ini inn ins is- isb isd isi isn iss n-i nbb nbd nbi nbn nbs ndb ndd ndi ndn nds nib nid nii nin nis nnb nni nnn nns nsb nsd nsi nsn nss sbb sbd sbi sbn sbs sdb sdd sdi sdn sds sib sid sii sin sis snb snd sni snn sns ss- ssb ssd ssi ssn sss