23 year old man, looking for one semester accomodation in Coimbra

I am a student of Politecnico di Torino, who is moving to Coimbra in September to develop a master thesis; i will stay exactly one semester, so I need a room for 5 months (from September to January included); I would like to live in a shared flat with other students, single or double room. I'd prefer a room which is near the University, since I am going to spend there most of my time. I have no constraints on the flatmates and on pets.