Definition: 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
Input: [20, 19, 46, 23, 6, 7, 48, 29, 2, 28, 45, 4, 35, 17, 5, 36, 39, 10, 1, 21], target=45

[10, 35]