diff --git a/util.py b/util.py
new file mode 100644
index 0000000..30cba7f
--- /dev/null
+++ b/util.py
@@ -0,0 +1,12 @@
+def pparent(paths):
+	paths = sorted(paths,key=len)
+	first = True
+	ret = []
+	while len(paths) > 0:
+		el1 = old_paths[0]
+		old_paths = paths[1:]
+		paths = []
+		for path in old_paths:
+			if not paths.startswith(el1):
+				paths.insert(0,path)
+    return ret
\ No newline at end of file