You are looking at a food machine which claims if you insert something in, you could get anything back!
You will insert something into the food machine, and the person under you decides what comes out, then that same person inserts something in and the person under does the same thing (gives, then inserts).
The thing inserted or the thing that is given out DOES NOT have to be food. It can be ANYTHING. Hence, the machine being MAGICAL!
Also, if you don't want to put INSERT: or GIVES: Then PLEASE make it specific onto which was given out and which was inserted. Thanks.
I'd prefer you to use the Insert: and Gives: format.
Examples Person 1 - Inserts: Chocolate Person 2 - Gives: Vanilla Ice Cream Inserts: iPod Person 3 - Gives: Jewlery Inserts: CD and blah blah blah.