eee eeg ees eex ege egg egi egs egx eie eig eii eis eix es- ese esg esi ess esx ex- exe exi exs exx ge- gee geg gei ges gex ggg ggi ggs gie gig gii gis gse gsg gsi gss gsx gxs ie- iee ieg iei ies iex ige igg igi igs iie iii iis iix is- ise isg isi iss ixe ixi se- see seg sei ses sex sge sgg sgi sgs sgx sie sig sii sis six ss- sse ssg ssi sss ssx sxi sxs xee xeg xes xex xge xgi xie xii xis xix xsi xss xxi xxx