-ic a-a a-b a-c a-i aaa aab aac aad aai aan aas ab- aba abb abc abd abi abn abs ac- aca acb acc acd aci acn acs ad- ada adb adc add adi adn ads ai- aia aib aic aid aii ain ais an- ana anb anc and ani ann ans as- asa asb asc asd asi asn ass baa bab bac bad bai ban bas bba bbb bbc bbd bbi bbn bbs bca bcb bcc bcd bci bcn bcs bda bdb bdc bdd bdi bds bi- bia bib bic bid bii bin bis bna bnb bnc bnd bni bnn bns bsa bsb bsc bsd bsi bsn bss c-- caa cab cac cad cai can cas cba cbb cbc cbd cbi cbn cbs cca ccb ccc ccd cci ccn ccs cda cdb cdc cdd cdi cdn cds ci- cia cib cic cid cii cin cis cn- cna cnb cnc cnd cni cnn cns csa csb csc csd csi csn css daa dab dac dad dai dan das dba dbb dbc dbd dbi dbn dbs dca dcb dcc dcd dci dcn dcs dda ddb ddc ddd ddi ddn dds di- dia dib dic did dii din dis dna dnb dnc dnd dni dnn dns dsa dsb dsc dsd dsi dsn dss i-d ia- iaa iab iac iad iai ian ias iba ibb ibc ibd ibi ibn ibs ica icb icc icd ici icn ics ida idb idc idd idi idn ids iia iib iic iid iii iin iis in- ina inb inc ind ini inn ins is- isa isb isc isd isi isn iss n-i naa nab nac nad nai nan nas nba nbb nbc nbd nbi nbn nbs nca ncb ncc ncd nci ncn ncs nda ndb ndc ndd ndi ndn nds nia nib nic nid nii nin nis nna nnb nnc nni nnn nns nsa nsb nsc nsd nsi nsn nss saa sab sac sad sai san sas sba sbb sbc sbd sbi sbn sbs sca scb scc scd sci scn scs sda sdb sdc sdd sdi sdn sds sia sib sic sid sii sin sis sna snb snc snd sni snn sns ss- ssa ssb ssc ssd ssi ssn sss