Definition: 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
Input: [7, 12, 4, 2, 39, 33, 23, 38, 14, 44, 16, 49, 27, 5, 31, 47, 43, 24, 41, 18], target=81
Output:
[38, 43]