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
Q: [42, 39, 45, 31, 2, 28, 8, 12, 4, 48, 14, 11, 21, 29, 46, 49, 13, 22, 20, 38], target=42
A: 
[28, 14]