After completing his Abitur the Gymnasium in OsnabrÃ 1\/4 ck , Wulff went to study law . He specialised in economic law at the University of OsnabrÃ 1\/4 ck . After completing his Abitur at the Ernst Moritz Arndt Gymnasium in OsnabrÃ 1\/4 ck , Wulff studied law with a specialisation in economics at the University of OsnabrÃ 1\/4 ck .