From the code on McDonalds UK reciept will autocomplete customer experience survey and output the the voucher code used for discounted food... saves time.
Just a note before,
This is neither illegal nor unethical because:
1 - You need an reciept to get the discount code;
2 - We all love the McDonalds, we will always give top marks in quality research.
It's just another tool made by the force of laziness.
Will take an reciept that looks like this...
Which states the code: C63WTMDRFP93
Using this python script it will output the voucher code on terminal at record speeds!!
Feel free to use this code in anyway you would like to.