-ic a-a a-b a-c a-i aaa aab aac aad aai aan aao aas ab- aba abb abc abd abi abn abo abs ac- aca acb acc acd aci acn aco acs ad- ada adb adc add adi adn ado ads ai- aia aib aic aid aii ain aio ais an- ana anb anc and ani ann ano ans aoa aob aoc aod aoi aon aoo aos as- asa asb asc asd asi asn aso ass baa bab bac bad bai ban bao bas bba bbb bbc bbd bbi bbn bbo bbs bca bcb bcc bcd bci bcn bco bcs bda bdb bdc bdd bdi bdo bds bi- bia bib bic bid bii bin bio bis bna bnb bnc bnd bni bnn bno bns boa bob boc bod boi bon boo bos bsa bsb bsc bsd bsi bsn bso bss c-- caa cab cac cad cai can cao cas cba cbb cbc cbd cbi cbn cbo cbs cca ccb ccc ccd cci ccn cco ccs cda cdb cdc cdd cdi cdn cdo cds ci- cia cib cic cid cii cin cio cis cn- cna cnb cnc cnd cni cnn cno cns co- coa cob coc cod coi con coo cos csa csb csc csd csi csn cso css daa dab dac dad dai dan dao das dba dbb dbc dbd dbi dbn dbo dbs dca dcb dcc dcd dci dcn dco dcs dda ddb ddc ddd ddi ddn ddo dds di- dia dib dic did dii din dio dis dna dnb dnc dnd dni dnn dno dns doa dob doc dod doi don doo dos dsa dsb dsc dsd dsi dsn dso dss i-d ia- iaa iab iac iad iai ian iao ias iba ibb ibc ibd ibi ibn ibo ibs ica icb icc icd ici icn ico ics ida idb idc idd idi idn ido ids iia iib iic iid iii iin iio iis in- ina inb inc ind ini inn ino ins io- ioa iob ioc iod ioi ion ioo ios is- isa isb isc isd isi isn iso iss n-i naa nab nac nad nai nan nao nas nba nbb nbc nbd nbi nbn nbo nbs nca ncb ncc ncd nci ncn nco ncs nda ndb ndc ndd ndi ndn ndo nds nia nib nic nid nii nin nio nis nna nnb nnc nni nnn nno nns no- noa nob noc nod noi non noo nos nsa nsb nsc nsd nsi nsn nso nss o-i oaa oab oac oad oai oan oao oas ob- oba obb obc obd obi obn obo obs oc- oca ocb occ ocd oci ocn oco ocs oda odb odc odd odi odn odo ods oia oib oic oid oii oin oio ois on- ona onb onc ond oni onn ono ons oo- ooa oob ooc ood ooi oon ooo oos os- osa osb osc osd osi osn oso oss saa sab sac sad sai san sao sas sba sbb sbc sbd sbi sbn sbo sbs sca scb scc scd sci scn sco scs sda sdb sdc sdd sdi sdn sdo sds sia sib sic sid sii sin sio sis sna snb snc snd sni snn sno sns soa sob soc sod soi son soo sos ss- ssa ssb ssc ssd ssi ssn sso sss