linksInput.groupBy(0).reduceGroup(new BuildOutgoingEdgeList());
linksInput.groupBy(0).reduceGroup(new BuildOutgoingEdgeList());
linksInput.groupBy(0).reduceGroup(new BuildOutgoingEdgeList());
linksInput.groupBy(0).reduceGroup(new BuildOutgoingEdgeList());
linksInput.groupBy(0).reduceGroup(new BuildOutgoingEdgeList());