a-a a-c aaa aac aad aas aay ac- aca acc acd acs acy ad- ada adc add ads ady as- asa asc asd ass asy ay- aya ayc ayd ays c-- caa cac cad cas cay cca ccc ccd ccs cda cdc cdd cds cdy csa csc csd css csy cya cyc cyd cys daa dac dad das day dca dcc dcd dcs dda ddc ddd dds ddy dsa dsc dsd dss dsy dy- dya dyc dyd dys dyy saa sac sad sas say sca scc scd scs sda sdc sdd sds sdy ss- ssa ssc ssd sss sy- sya syc syd sys yaa yac yad yas yay yca ycc ycd ycs ycy yda yds ydy ysa ysc yss ysy yyc yys yyy