diff --git a/app/main.py b/app/main.py
index 8fbf3053..378e3e16 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1 +1,42 @@
-#  write your code here
+class Animal:
+    def __init__(self, name: str, appetite: int, is_hungry: bool = True) -> None:
+        self.name = name
+        self.appetite = appetite
+        self.is_hungry = is_hungry
+
+    def print_name(self) -> None:
+        print(f"Hello, I'm {self.name}")
+
+    def feed(self) -> int:
+        if self.is_hungry:
+            print(f"Eating {self.appetite} food points...")
+            return self.appetite
+        else:
+            return 0
+
+
+class Cat(Animal):
+    def __init__(self, name: str, is_hungry: bool = True) -> None:
+        super().__init__(appetite=3)
+        self.name = name
+        self.is_hungry = is_hungry
+
+    def catch_mouse(self) -> None:
+        print("The hunt began!")
+
+
+class Dog(Animal):
+    def __init__(self, name: str, is_hungry: bool = True) -> None:
+        super().__init__(appetite=7)
+        self.name = name
+        self.is_hungry = is_hungry
+
+    def bring_slippers(self) -> None:
+        print("The slippers delivered!")
+
+
+def feed_animals(animals: list[Animal]) -> int:
+    sum = 0
+    for item in animals:
+        sum += item.appetite
+    return sum