inputs: hypothesis: The real name of Tarek Hussein Farid was Aribert Ferdinand Heim. premise: CAIRO — Even in old age the imposingly tall, athletic German known to locals as Tarek Hussein Farid maintained the discipline to walk some 15 miles each day through the busy streets of Egypt's capital. He walked to the world-renowned Al Azhar mosque here, where he converted to Islam, and to the ornate J. Groppi Cafe downtown, where he ordered the chocolate cakes he sent to friends and bought the bonbons he gave to their children, who called him Uncle Tarek. Friends and acquaintances here in Egypt also remember him as an avid amateur photographer who almost always wore a camera around his neck, but never allowed himself to be photographed. And with good reason: Uncle Tarek was born Aribert Ferdinand Heim, a member of Hitler's elite Waffen-SS and a medical doctor at the Buchenwald, Sachsenhausen and Mauthausen concentration camps.