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

[47, 24, 18, 7, 3, 35, 9, 21, 20, 30, 13, 44, 23, 17, 29, 46, 36, 6, 25, 4], target=54
[47, 7]

[25, 1, 39, 40, 29, 49, 22, 43, 42, 38, 48, 2, 46, 15, 16, 12, 34, 3, 27, 30], target=55
[40, 15]

[45, 6, 5, 17, 23, 29, 20, 46, 30, 37, 13, 35, 38, 40, 36, 10, 49, 15, 44, 24], target=30

[17, 13]