gistfile1.txt

You're tasked with enforcing the rule "If you are less than 21 years old, you are restricted to ordering non-alcoholic drinks."

You have a set of receipts which list an age and a drink order, with one or the other obscured.

Given the information you can see on the following receipts, which fields do you need to reveal to detect violations of the rule?


        1         2         3         4
--------------------------------------------
age:  | 19     |  23    |   XX      | XX   |
drink:| XXXX   |  XXX   |   vodka   | coke |