-ey a-a a-c aaa aac aae aaf aag aas aay ac- aca acc ace acf acg acs acy aea aec aee aef aeg aes aey af- afa afc afe aff afg afs afy ag- aga agc age agf agg ags agy as- asa asc ase asf asg ass asy ay- aya ayc aye ayf ays c-- caa cac cae caf cag cas cay cca ccc cce ccf ccg ccs ce- cea cec cee cef ceg ces cey cfa cfc cfe cff cfg cfs cga cgc cge cgg cgs cgy csa csc cse csf csg css csy cya cyc cye cyf cyg cys eaa eac eae eaf eag eas ec- eca ecc ece ecf ecg ecs eea eec eee eef eeg ees eey ef- efa efc efe eff efg efs ega egc ege egf egg egs egy es- esa esc ese esf esg ess esy eya eyc eye eys faa fac fae faf fag fas fay fca fcc fce fcf fcg fcs fcy fea fec fee fef feg fes fey ffa ffc ffe fff ffg ffs ffy fga fgc fge fgf fgg fgs fsa fsc fse fsf fsg fss fy- fya fyc fye gaa gac gae gaf gag gas gay gca gcc gce gcf gcg gcs ge- gea gec gee gef geg ges gey gfa gfc gfe gff gfs gfy gga ggc ggg ggs gsa gsc gse gsf gsg gss gy- gya gye gyf gys saa sac sae saf sag sas say sca scc sce scf scg scs se- sea sec see sef seg ses sey sfa sfc sfe sff sfg sfs sga sgc sge sgf sgg sgs ss- ssa ssc sse ssf ssg sss sy- sya syc sye syg sys yaa yac yae yaf yag yas yay yca ycc yce ycf ycs ycy yea yec yee yef yeg yes yey yfa yfc yfe yff yfs yga ygc ysa ysc yse ysg yss ysy yyc yye yyf yyg yys yyy