I have a list A and a list B, and I want someone to be able to choose n from the cumulative list formed by combining A and B. However, my initial attempts were subpar at best:
You get n of your choice from list A and list B
I read this as you get n from A and n from B
You get n of your choice from list A or list B
I read this as you decide either A or B, and then choose n from it.
How do you correctly word my request?