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]: [38, 44, 45, 4, 43, 40, 41, 42, 48, 10, 32, 3, 47, 20, 17, 28, 31, 34, 27, 2], target=21
[EX A]: [4, 17]

[EX Q]: [35, 38, 44, 37, 28, 18, 9, 6, 42, 7, 15, 45, 43, 24, 22, 21, 23, 2, 39, 19], target=58
[EX A]: [15, 43]

[EX Q]: [43, 48, 13, 35, 22, 3, 24, 23, 47, 2, 33, 29, 30, 44, 34, 14, 5, 12, 40, 19], target=33
[EX A]:
[3, 30]