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: [18, 11, 44, 20, 33, 38, 14, 21, 43, 9, 5, 42, 27, 29, 37, 25, 28, 3, 8, 49], target=48

[21, 27]