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

Answer: [4, 17]


Question: [28, 32, 16, 19, 36, 8, 13, 38, 25, 1, 15, 42, 29, 49, 39, 31, 20, 35, 30, 37], target=43

Answer: [28, 15]


Question: [8, 46, 34, 18, 44, 31, 41, 40, 11, 24, 26, 19, 47, 27, 13, 9, 7, 36, 30, 20], target=51

Answer:
[40, 11]