add non-dynamic text 2 dynamic field

Great plugin.
I need to add additional (non-dynamic) text to a dynamic field.
[dynamictext your-subject “I need more info on this product CF7_GET key=’refer-name'”]Can you provide me the shortcode for adding to my functions.php

Thank you royaltask

https://wordpress.org/plugins/contact-form-7-dynamic-text-extension/