You will be given a definition of a task first, then some input of the task.
You are given a list of integers and an integer target, return a list of a pair of numbers in any order such that they add up to target. If there is no such pair of numbers, then return an empty list

[31, 44, 1, 45, 5, 24, 19, 42, 20, 8, 37, 15, 43, 11, 26, 49, 33, 6, 12, 17], target=15
Output:
[]