TASK 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
PROBLEM: [11, 30, 12, 43, 28, 31, 17, 13, 46, 7, 34, 39, 2, 32, 27, 19, 22, 38, 14, 49], target=47

SOLUTION: [30, 17]

PROBLEM: [22, 2, 27, 4, 41, 44, 45, 40, 14, 36, 35, 16, 13, 8, 25, 7, 5, 43, 9, 6], target=41

SOLUTION: [27, 14]

PROBLEM: [8, 37, 11, 21, 18, 13, 7, 40, 29, 17, 2, 15, 39, 34, 27, 42, 16, 47, 33, 23], target=31

SOLUTION:
[18, 13]