Update app.py

app.py

@@ -18,7 +18,7 @@ def validate_input(input_string):
     pattern = r'^[a-zA-Z0-9]+$|^[a-zA-Z]+$'
     
     # Check if input contains at least one non-numeric character
-    if re.match(pattern, input_string):
+    if re.match(pattern, input_string) or input_string.isdigit():
         return False
     else:
         return True