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
Example: [2,4,5,6,4,8,9,10], target=10
Example solution: [2,8]
Example explanation: 2 and 8 are present in the list and sum to 10 which was the target sum

Problem: [38, 40, 43, 11, 37, 42, 33, 2, 14, 36, 49, 26, 7, 19, 32, 45, 10, 39, 29, 20], target=90

Solution: []