q = 2^255-19
E = ellinit(Mod([0, 486662, 0, 1, 0], q), Mod(1, q))
u = Mod(9, q)
v = sqrt(u^3 + 486662*u^2 + u)
g = [u, v]
o = 2^252 + 27742317777372353535851937790883648493