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

[1, 28, 8, 31, 40, 30, 24, 34, 35, 37, 22, 45, 41, 11, 26, 47, 33, 27, 49, 18], target=24
[]

[43, 39, 41, 29, 42, 30, 36, 46, 8, 20, 19, 33, 21, 2, 14, 5, 1, 38, 49, 24], target=77
[41, 36]

[30, 44, 6, 39, 34, 21, 2, 47, 1, 37, 5, 7, 18, 14, 16, 45, 11, 36, 29, 26], target=19

[1, 18]