Update app.py

app.py

@@ -245,6 +245,8 @@ def get_links(user_input):
 
 
 def validation(user_input):
+    if len(user_input)<3 :
+        return "invalid"
     user_words = set(user_input.lower().split())
     if any(word not in stop_words for word in user_words):
         return "valid"