a-a a-c aaa aac aad aae aap aas ac- aca acc acd ace acp acs ad- ada adc add ade adp ads aea aec aed aee aep aes ap- apa apc apd ape app aps as- asa asc asd ase asp ass c-- caa cac cad cae cap cas cca ccc ccd cce ccp ccs cda cdc cdd cde cdp cds ce- cea cec ced cee cep ces cpa cpc cpd cpe cpp cps csa csc csd cse csp css daa dac dad dae dap das dca dcc dcd dce dcp dcs dda ddc ddd dde ddp dds de- dea dec ded dee dep des dpa dpc dpd dpe dpp dps dsa dsc dsd dse dsp dss eaa eac ead eae eap eas ec- eca ecc ecd ece ecs ed- eda edc edd ede edp eds eea eec eed eee eep ees ep- epa epc epd epe epp eps es- esa esc esd ese esp ess p-p paa pac pad pae pap pas pca pcc pcd pce pcp pcs pda pdc pdd pde pdp pds pea pec ped pee pep pes ppa ppc ppd ppe ppp pps ps- psa psc psd pse psp pss saa sac sad sae sap sas sca scc scd sce scp scs sda sdc sdd sde sdp sds se- sea sec sed see sep ses spa spc spd spe spp sps ss- ssa ssc ssd sse ssp sss