begin
java.lang.RuntimeException: 
java.lang.IllegalAccessException: Main$1
	at EDU.neu.ccs.demeter.dj.TraversalGraph.traverse(TraversalGraph.java:98)
	at EDU.neu.ccs.demeter.dj.TraversalGraph.traverse(TraversalGraph.java:72)
	at EDU.neu.ccs.demeter.dj.TraversalGraph.traverse(TraversalGraph.java:58)
	at Main.main(Main.java:14)