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: [21, 12, 17, 6, 1, 39, 49, 9, 25, 45, 11, 19, 26, 48, 5, 10, 44, 46, 43, 8], target=16

[6, 10]