a-a a-c aaa aac aad aae aak aao aas ac- aca acc acd ace ack aco acs ad- ada adc add ade adk ado ads aea aec aed aee aek aeo aes aka akc akd ake akk ako aks aoa aoc aod aoe aok aoo aos as- asa asc asd ase ask aso ass c-- caa cac cad cae cak cao cas cca ccc ccd cce cck cco ccs cda cdc cdd cde cdk cdo cds ce- cea cec ced cee cek ceo ces cka ckc ckd cko cks co- coa coc cod coe cok coo cos csa csc csd cse csk cso css daa dac dad dae dak dao das dca dcc dcd dce dck dco dcs dda ddc ddd dde ddk ddo dds de- dea dec ded dee dek deo des dka dkc dke dkk dko dks doa doc dod doe dok doo dos dsa dsc dsd dse dsk dso dss eaa eac ead eae eak eao eas ec- eca ecc ecd ece eck eco ecs ed- eda edc edd ede edk edo eds eea eec eed eee eek eeo ees eka ekc ekd eke eko eks eo- eoa eoc eod eoe eok eoo eos es- esa esc esd ese esk eso ess ka- kaa kac kad kae kak kao kas kca kcc kcd kce kck kcs kda kdc kde kdk kdo kds ke- kea kec ked kee kek keo kes kkc kke kkk kks koa koc kod koe kok koo kos ksa ksc ksd kse ksk kso kss oaa oac oad oae oak oao oas oc- oca occ ocd ock oco ocs oda odc odd ode odo ods oea oec oed oee oeo oes oka okc okd oke okk oko oks oo- ooa ooc ood ook ooo oos os- osa osc osd ose osk oso oss saa sac sad sae sak sao sas sca scc scd sce sck sco scs sda sdc sdd sde sdk sdo sds se- sea sec sed see sek seo ses sk- ska skc skd ske skk sko sks soa soc sod soe sok soo sos ss- ssa ssc ssd sse ssk sso sss