a-a a-c aaa aac aad aae aan aap ac- aca acc acd ace acn acp ad- ada adc add ade adn adp aea aec aed aee aen aep an- ana anc and ane ann anp ap- apa apc apd ape apn app c-- caa cac cad cae can cap cca ccc ccd cce ccn ccp cda cdc cdd cde cdn cdp ce- cea cec ced cee cen cep cn- cna cnc cnd cne cnn cnp cpa cpc cpd cpe cpn cpp daa dac dad dae dan dap dca dcc dcd dce dcn dcp dda ddc ddd dde ddn ddp de- dea dec ded dee den dep dna dnc dnd dne dnn dnp dpa dpc dpd dpe dpn dpp eaa eac ead eae ean eap ec- eca ecc ecd ece ecn ed- eda edc edd ede edn edp eea eec eed eee een eep en- ena enc end ene enn enp ep- epa epc epd epe epn epp naa nac nad nae nan nap nca ncc ncd nce ncn ncp nda ndc ndd nde ndn ndp ne- nea nec ned nee nen nep nna nnc nne nnn nnp npa npc npd npe npn npp p-p paa pac pad pae pan pap pca pcc pcd pce pcn pcp pda pdc pdd pde pdn pdp pea pec ped pee pen pep pn- pna pnc pnd pne pnn pnp ppa ppc ppd ppe ppn ppp