a-a a-c aaa aac aad aan aao aas ac- aca acc acd acn aco acs ad- ada adc add adn ado ads an- ana anc and ann ano ans aoa aoc aod aon aoo aos as- asa asc asd asn aso ass c-- caa cac cad can cao cas cca ccc ccd ccn cco ccs cda cdc cdd cdn cdo cds cn- cna cnc cnd cnn cno cns co- coa coc cod con coo cos csa csc csd csn cso css daa dac dad dan dao das dca dcc dcd dcn dco dcs dda ddc ddd ddn ddo dds dna dnc dnd dnn dno dns doa doc dod don doo dos dsa dsc dsd dsn dso dss naa nac nad nan nao nas nca ncc ncd ncn nco ncs nda ndc ndd ndn ndo nds nna nnc nnn nno nns no- noa noc nod non noo nos nsa nsc nsd nsn nso nss oaa oac oad oan oao oas oc- oca occ ocd ocn oco ocs oda odc odd odn odo ods on- ona onc ond onn ono ons oo- ooa ooc ood oon ooo oos os- osa osc osd osn oso oss saa sac sad san sao sas sca scc scd scn sco scs sda sdc sdd sdn sdo sds sna snc snd snn sno sns soa soc sod son soo sos ss- ssa ssc ssd ssn sso sss