diff --git a/app/main.py b/app/main.py
index f07695b9b..cb1e77c74 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,7 +1,11 @@
 lucky_number = 777
+
 pi = 3.14
+
 one_is_a_prime_number = False
+
 name = "Richard"
+
 my_favourite_films = [
     "The Shawshank Redemption",
     "The Lord of the Rings: The Return of the King",
@@ -9,11 +13,18 @@
     "The Good, the Bad and the Ugly",
     "The Matrix",
 ]
+
 profile_info = ("michel", "michel@gmail.com", "12345678")
+
 marks = {
     "John": 4,
     "Sergio": 3,
 }
+
 collection_of_coins = {1, 2, 25}
 
-# write your code here
+# noinspection PyUnresolvedReferences
+sorted_variables = {
+    "mutable": [my_favourite_films, marks, collection_of_coins],
+    "immutable": [lucky_number, pi, one_is_a_prime_number, name, profile_info]
+}
diff --git a/tests/test_main.py b/tests/test_main.py
index a5cb4cbc0..890250a6b 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -3,7 +3,6 @@
 
 import app.main
 
-
 @pytest.mark.parametrize(
     "variable_name",
     [