a-a a-c aaa aac aad aae aak aan aas ac- aca acc acd ace ack acn acs ad- ada adc add ade adk adn ads aea aec aed aee aek aen aes aka akc akd ake akk akn aks an- ana anc and ane ank ann ans as- asa asc asd ase ask asn ass c-- caa cac cad cae cak can cas cca ccc ccd cce cck ccn ccs cda cdc cdd cde cdk cdn cds ce- cea cec ced cee cek cen ces cka ckc ckd cks cn- cna cnc cnd cne cnn cns csa csc csd cse csk csn css daa dac dad dae dak dan das dca dcc dcd dce dck dcn dcs dda ddc ddd dde ddk ddn dds de- dea dec ded dee dek den des dka dkc dke dkk dks dna dnc dnd dne dnk dnn dns dsa dsc dsd dse dsk dsn dss eaa eac ead eae eak ean eas ec- eca ecc ecd ece eck ecn ecs ed- eda edc edd ede edk edn eds eea eec eed eee eek een ees eka ekc ekd eke eks en- ena enc end ene enk enn ens es- esa esc esd ese esk esn ess ka- kaa kac kad kae kak kan kas kca kcc kcd kce kck kcn kcs kda kdc kde kdk kds ke- kea kec ked kee kek ken kes kkc kke kkk kkn kks kn- kna knc knd kne knk knn ksa ksc ksd kse ksk ksn kss naa nac nad nae nak nan nas nca ncc ncd nce nck ncn ncs nda ndc ndd nde ndk ndn nds ne- nea nec ned nee nek nen nes nka nkc nke nkk nkn nks nna nnc nne nnk nnn nns nsa nsc nsd nse nsk nsn nss saa sac sad sae sak san sas sca scc scd sce sck scn scs sda sdc sdd sde sdk sdn sds se- sea sec sed see sek sen ses sk- ska skc skd ske skk sks sna snc snd sne snk snn sns ss- ssa ssc ssd sse ssk ssn sss