a-a a-c aaa aac aad aae aao aas ac- aca acc acd ace aco acs ad- ada adc add ade ado ads aea aec aed aee aeo aes aoa aoc aod aoe aoo aos as- asa asc asd ase aso ass c-- caa cac cad cae cao cas cca ccc ccd cce cco ccs cda cdc cdd cde cdo cds ce- cea cec ced cee ceo ces co- coa coc cod coe coo cos csa csc csd cse cso css daa dac dad dae dao das dca dcc dcd dce dco dcs dda ddc ddd dde ddo dds de- dea dec ded dee deo des doa doc dod doe doo dos dsa dsc dsd dse dso dss eaa eac ead eae eao eas ec- eca ecc ecd ece eco ecs ed- eda edc edd ede edo eds eea eec eed eee eeo ees eo- eoa eoc eod eoe eoo eos es- esa esc esd ese eso ess oaa oac oad oae oao oas oc- oca occ ocd oco ocs oda odc odd ode odo ods oea oec oed oee oeo oes oo- ooa ooc ood ooo oos os- osa osc osd ose oso oss saa sac sad sae sao sas sca scc scd sce sco scs sda sdc sdd sde sdo sds se- sea sec sed see seo ses soa soc sod soe soo sos ss- ssa ssc ssd sse sso sss