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

[EX Q]: [31, 29, 8, 22, 7, 2, 48, 35, 12, 13, 16, 34, 17, 40, 1, 45, 43, 39, 20, 26], target=39
[EX A]: [31, 8]

[EX Q]: [20, 21, 23, 47, 16, 6, 40, 45, 44, 17, 9, 33, 25, 39, 35, 27, 34, 13, 37, 10], target=30
[EX A]: [21, 9]

[EX Q]: [41, 35, 1, 4, 23, 37, 21, 9, 8, 27, 49, 15, 14, 7, 25, 30, 29, 46, 11, 5], target=89
[EX A]: