diff --git a/Week05/emails_elif_ozkanat.py b/Week05/emails_elif_ozkanat.py
new file mode 100644
index 00000000..4b5d8d13
--- /dev/null
+++ b/Week05/emails_elif_ozkanat.py
@@ -0,0 +1,28 @@
+import re
+
+
+class Emails(list):
+    def __init__(self, data):
+        self.validate(data)
+        # duplicate'leri kaldır
+        unique = list(dict.fromkeys(data))
+        super().__init__(unique)
+        self.data = self
+
+    def validate(self, data):
+        # sadece string olmalı
+        for item in data:
+            if not isinstance(item, str):
+                raise ValueError("All items must be strings")
+
+        # basit ama yeterli email kontrolü
+        email_pattern = r"^[^@]+@[^@]+\.[^@]+$"
+        for email in data:
+            if not re.match(email_pattern, email):
+                raise ValueError("Invalid email address")
+
+    def __repr__(self):
+        return f"Emails({list(self)})"
+
+    def __str__(self):
+        return ", ".join(self)