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

[42, 39, 45, 31, 2, 28, 8, 12, 4, 48, 14, 11, 21, 29, 46, 49, 13, 22, 20, 38], target=42
[28, 14]

[9, 27, 40, 16, 4, 10, 38, 1, 45, 23, 25, 31, 14, 21, 34, 36, 37, 28, 22, 33], target=18
[4, 14]

[15, 34, 45, 27, 36, 24, 31, 48, 3, 9, 42, 2, 16, 8, 30, 49, 14, 6, 26, 39], target=38

[36, 2]