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: [30, 44, 6, 39, 34, 21, 2, 47, 1, 37, 5, 7, 18, 14, 16, 45, 11, 36, 29, 26], target=19
Output:
[1, 18]