diff --git a/Course3/Lab4/validations.py b/Course3/Lab4/validations.py
index b18de65a2e..c6beffacdb 100644
--- a/Course3/Lab4/validations.py
+++ b/Course3/Lab4/validations.py
@@ -8,7 +8,8 @@ def validate_user(username, minlen):
         raise TypeError("username must be a string")
     if minlen < 1:
         raise ValueError("minlen must be at least 1")
-    
+    if username[0] == "." or username[0] == "_":
+        return False
     # Usernames can't be shorter than minlen
     if len(username) < minlen:
         return False
@@ -20,5 +21,8 @@ def validate_user(username, minlen):
         return False
     return True
 
-
+print(validate_user("blue.kale", 3)) # True
+print(validate_user(".blue.kale", 3)) # Currently True, should be False
+print(validate_user("red_quinoa", 4)) # True
+print(validate_user("_red_quinoa", 4)) # Currently True, should be False