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: [47, 24, 18, 7, 3, 35, 9, 21, 20, 30, 13, 44, 23, 17, 29, 46, 36, 6, 25, 4], target=54

[18, 36]