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: [35, 6, 11, 14, 7, 30, 45, 15, 37, 20, 21, 43, 13, 27, 17, 38, 31, 29, 22, 4], target=37
Output:
[7, 30]