diff --git a/Course3/Lab4/validations.py b/Course3/Lab4/validations.py
old mode 100644
new mode 100755
index b18de65a2e..72aa21f433
--- a/Course3/Lab4/validations.py
+++ b/Course3/Lab4/validations.py
@@ -16,9 +16,14 @@ def validate_user(username, minlen):
     if not re.match('^[a-z0-9._]*$', username):
         return False
     # Usernames can't begin with a number
-    if username[0].isnumeric():
+    if re.match("^[0-9._]", username):
         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", 3)) # True
+print(validate_user("_red_quinoa", 3)) # Currently True, should be False
+