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: [42, 29, 12, 38, 31, 17, 15, 1, 14, 23, 8, 5, 20, 34, 21, 47, 4, 49, 24, 19], target=30

[1, 29]