In 1994, John Trono introduced the Santa Claus problem.  Its description can be found in\\
John Trono. 
[[http://dx.doi.org.ezproxy.library.yorku.ca/10.1145/187387.187391|A new exercise in concurrency]].
//ACM SIGCSE Bulletin//, 26(3):8-10, September 1994.\\
The paper also contains a solution.  Implement this solution in Java.  In particular, create the classes Santa, Reindeer, and Elf.  Use the Semaphore class whose API can be found [[https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Semaphore.html|here]].