a-a a-c aaa aac aad aaf aan aay ac- aca acc acd acf acn acy ad- ada adc add adf adn ady af- afa afc afd aff afn afy an- ana anc and anf ann any ay- aya ayc ayd ayf ayn c-- caa cac cad caf can cay cca ccc ccd ccf ccn cda cdc cdd cdf cdn cdy cfa cfc cfd cff cfn cn- cna cnc cnd cnf cnn cny cya cyc cyd cyf cyn daa dac dad daf dan day dca dcc dcd dcf dcn dda ddc ddd ddf ddn ddy dfa dfc dfd dff dfn dna dnc dnd dnf dnn dny dy- dya dyc dyd dyn dyy faa fac fad faf fan fay fca fcc fcd fcf fcn fcy fda fdc fdd fdf fdn ffa ffc ffd fff ffn ffy fna fnc fnd fnf fnn fy- fya fyc fyn naa nac nad naf nan nay nca ncc ncd ncf ncn nda ndc ndd ndf ndn ndy nfa nfc nfd nff nfn nna nnc nnf nnn nya nyc nyd nyf nyn nyy yaa yac yad yaf yan yay yca ycc ycd ycf ycy yda ydn ydy yfa yfc yfd yff yna ynd ynn yny yyc yyf yyy