a-a a-c aaa aac aad aae aak aas ac- aca acc acd ace ack acs ad- ada adc add ade adk ads aea aec aed aee aek aes aka akc akd ake akk aks as- asa asc asd ase ask ass c-- caa cac cad cae cak cas cca ccc ccd cce cck ccs cda cdc cdd cde cdk cds ce- cea cec ced cee cek ces cka ckc ckd cks csa csc csd cse csk css daa dac dad dae dak das dca dcc dcd dce dck dcs dda ddc ddd dde ddk dds de- dea dec ded dee dek des dka dkc dke dkk dks dsa dsc dsd dse dsk dss eaa eac ead eae eak eas ec- eca ecc ecd ece eck ecs ed- eda edc edd ede edk eds eea eec eed eee eek ees eka ekc ekd eke eks es- esa esc esd ese esk ess ka- kaa kac kad kae kak kas kca kcc kcd kce kck kcs kda kdc kde kdk kds ke- kea kec ked kee kek kes kkc kke kkk kks ksa ksc ksd kse ksk kss saa sac sad sae sak sas sca scc scd sce sck scs sda sdc sdd sde sdk sds se- sea sec sed see sek ses sk- ska skc skd ske skk sks ss- ssa ssc ssd sse ssk sss