PHP ERROR IN FOOTER

Hello, I am getting the following error messages in my homepage footer. How do I fix this in my php? I do not know how to code, but can try if someone guides me through this. Thanks in advance.

Warning: Use of undefined constant left – assumed ‘left’ (this will throw an Error in a future version of PHP) in?/home/customer/www/giannettiartisans.com/public_html/wp-content/themes/ydg-v3.2/footer.php?on line?6

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