How to understand this task?

Question

Programming

I was given a task that sounds like this: "given a matrix of numbers, count the number of columns that are made up of pairwise different numbers."
I can't figure out what columns should be, such that they cannot have two identical elements in a row; such that there cannot be identical elements in a column at all, or such that several columns should not have identical elements, or something else?
What columns are implied?

Answer 1

This means that any pair of numbers in the column will be different.
Those. "such that there can't be identical elements in a column at all"