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: [9, 27, 40, 16, 4, 10, 38, 1, 45, 23, 25, 31, 14, 21, 34, 36, 37, 28, 22, 33], target=18

[4, 14]