diff --git a/nafuma/auxillary.py b/nafuma/auxillary.py
index 45633c5..bd30713 100644
--- a/nafuma/auxillary.py
+++ b/nafuma/auxillary.py
@@ -103,4 +103,11 @@ def get_filenames(path, ext, filter=''):
  
     filenames = [os.path.join(path, filename) for filename in os.listdir(path) if os.path.isfile(os.path.join(path, filename)) and filename.endswith(ext) and filter in filename] 
         
+    return filenames
+
+def move_list_element_last(filenames,string):
+    for i,file in enumerate(filenames):
+        if string in file:
+            del filenames[i]
+            filenames.append(file)
     return filenames
\ No newline at end of file