a-a aaa aad aae aan aap ad- ada add ade adn adp aea aed aee aen aep an- ana and ane ann anp ap- apa apd ape apn app daa dad dae dan dap dda ddd dde ddn ddp de- dea ded dee den dep dna dnd dne dnn dnp dpa dpd dpe dpn dpp eaa ead eae ean eap ed- eda edd ede edn edp eea eed eee een eep en- ena end ene enn enp ep- epa epd epe epn epp naa nad nae nan nap nda ndd nde ndn ndp ne- nea ned nee nen nep nna nne nnn nnp npa npd npe npn npp p-p paa pad pae pan pap pda pdd pde pdn pdp pea ped pee pen pep pn- pna pnd pne pnn pnp ppa ppd ppe ppn ppp