diff --git a/src/sectubs/exercises.py b/src/sectubs/exercises.py
index 5f832f7..8feb650 100644
--- a/src/sectubs/exercises.py
+++ b/src/sectubs/exercises.py
@@ -20,4 +20,11 @@ class Exercise00:
             return "{2} - {1} - {0}"
 
         if mode == "dict":
-            return "x, y = ({x}, {y})"
+            return "x, y = ({x:.1f}, {y:.04f})"
+
+    def listfiles(self, directory, filetype=''):
+        from pathlib import Path
+        path = Path(directory)
+
+        for file in path.glob('**/*'+filetype):
+            yield str(file.name)