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: [10, 44, 42, 29, 17, 19, 39, 38, 35, 6, 11, 14, 40, 41, 47, 12, 22, 2, 15, 34], target=20
Output:
[6, 14]