Brugge-Gent rail ticket

We are planning to visit Gant and Brugge in one day, our plan is to go from Bruxelles to Gant and then Brugge and back to Bruxelles.

Shall we buy the weekend ticket? Bruxelles-Gant and Gant- Brugge? Would this cover our trip?

Your help is much appreciated.

Thank you!!