a-a a-c aaa aac aad aae aas ac- aca acc acd ace acs ad- ada adc add ade ads aea aec aed aee aes as- asa asc asd ase ass c-- caa cac cad cae cas cca ccc ccd cce ccs cda cdc cdd cde cds ce- cea cec ced cee ces csa csc csd cse css daa dac dad dae das dca dcc dcd dce dcs dda ddc ddd dde dds de- dea dec ded dee des dsa dsc dsd dse dss eaa eac ead eae eas ec- eca ecc ecd ece ecs ed- eda edc edd ede eds eea eec eed eee ees es- esa esc esd ese ess saa sac sad sae sas sca scc scd sce scs sda sdc sdd sde sds se- sea sec sed see ses ss- ssa ssc ssd sse sss