a-a a-c aaa aac aad aae aak aan ac- aca acc acd ace ack acn ad- ada adc add ade adk adn aea aec aed aee aek aen aka akc akd ake akk akn an- ana anc and ane ank ann c-- caa cac cad cae cak can cca ccc ccd cce cck ccn cda cdc cdd cde cdk cdn ce- cea cec ced cee cek cen cka ckc ckd cn- cna cnc cnd cne cnn daa dac dad dae dak dan dca dcc dcd dce dck dcn dda ddc ddd dde ddk ddn de- dea dec ded dee dek den dka dkc dke dkk dna dnc dnd dne dnk dnn eaa eac ead eae eak ean ec- eca ecc ecd ece eck ecn ed- eda edc edd ede edk edn eea eec eed eee eek een eka ekc ekd eke en- ena enc end ene enk enn ka- kaa kac kad kae kak kan kca kcc kcd kce kck kcn kda kdc kde kdk ke- kea kec ked kee kek ken kkc kke kkk kkn kn- kna knc knd kne knk knn naa nac nad nae nak nan nca ncc ncd nce nck ncn nda ndc ndd nde ndk ndn ne- nea nec ned nee nek nen nka nkc nke nkk nkn nna nnc nne nnk nnn