diff --git a/app/main.py b/app/main.py
index f07695b9b..a97d97220 100644
--- a/app/main.py
+++ b/app/main.py
@@ -16,4 +16,29 @@
 }
 collection_of_coins = {1, 2, 25}
 
-# write your code here
+variables = [
+    lucky_number,
+    pi,
+    one_is_a_prime_number,
+    name,
+    my_favourite_films,
+    profile_info,
+    marks,
+    collection_of_coins,
+]
+
+
+def check_mutability(variables: list) -> dict:
+    sorted_variables = {
+        "mutable": [],
+        "immutable": [],
+    }
+    for declared_variable in variables:
+        if type(declared_variable) in (list, dict, set):
+            sorted_variables["mutable"].append(declared_variable)
+        else:
+            sorted_variables["immutable"].append(declared_variable)
+    return sorted_variables
+
+
+sorted_variables = check_mutability(variables)