Isogeny-based cryptosystems (problem 3)

Solve Decisional Diffie-Hellman (DDH) in the context of CSIDH: Let $E_0$ be a supersingular elliptic curve defined over $\mathbb F_p$ with endomorphism ring $\mathbb Z[\pi]$. Distinguish between triples $(\mathfrak a * E_0, \mathfrak b* E_0,\mathfrak c* E_0)$ and triples $(\mathfrak a * E_0, \mathfrak b* E_0,\mathfrak a\mathfrak b * E_0)$ where $\mathfrak a, \mathfrak b, \mathfrak c$ are ideals in $\mathbb Z[\pi]$ of odd norm.