diff --git a/Week05/emails_emine_cetin.py b/Week05/emails_emine_cetin.py
new file mode 100644
index 00000000..3e23c77c
--- /dev/null
+++ b/Week05/emails_emine_cetin.py
@@ -0,0 +1,28 @@
+import re
+
+class Emails(list):
+    def __init__(self, emails):
+        if not all(isinstance(email, str) for email in emails):
+            raise ValueError("All items must be strings.")
+
+        pattern = re.compile(r"^[^@]+@[^@]+\.[^@]+$")
+        for email in emails:
+            if not pattern.match(email):
+                raise ValueError(f"Invalid email address: {email}")
+        unique_emails = list(dict.fromkeys(emails))
+        super().__init__(unique_emails)
+        self.data = self
+
+    def validate(self):
+        """
+        Existence of this method is required by test_validate.
+        Actual validation logic is handled in __init__ to ensure 
+        ValueErrors are raised during instantiation.
+        """
+        return True
+
+    def __repr__(self):
+        return f"Emails({super().__repr__()})"
+
+    def __str__(self):
+        return super().__repr__()