Collection<Tree<String>> results = res==null ? new HashSet<Tree<String>>() : res.expand(false);
System.out.print("\r");
if (results.size() == 0 && output.length > 0) {
Collection<Tree<String>> results = res==null ? new HashSet<Tree<String>>() : res.expand(false);
System.out.print("\r");
if (results.size() == 0 && output.length > 0) {