a-a a-c aaa aac aad aae aap ac- aca acc acd ace acp ad- ada adc add ade adp aea aec aed aee aep ap- apa apc apd ape app c-- caa cac cad cae cap cca ccc ccd cce ccp cda cdc cdd cde cdp ce- cea cec ced cee cep cpa cpc cpd cpe cpp daa dac dad dae dap dca dcc dcd dce dcp dda ddc ddd dde ddp de- dea dec ded dee dep dpa dpc dpd dpe dpp eaa eac ead eae eap ec- eca ecc ecd ece ed- eda edc edd ede edp eea eec eed eee eep ep- epa epc epd epe epp p-p paa pac pad pae pap pca pcc pcd pce pcp pda pdc pdd pde pdp pea pec ped pee pep ppa ppc ppd ppe ppp