instruction:
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
question:
[18, 11, 44, 20, 33, 38, 14, 21, 43, 9, 5, 42, 27, 29, 37, 25, 28, 3, 8, 49], target=48
answer:
[43, 5]


question:
[15, 34, 45, 27, 36, 24, 31, 48, 3, 9, 42, 2, 16, 8, 30, 49, 14, 6, 26, 39], target=38
answer:
[36, 2]


question:
[30, 41, 28, 8, 42, 4, 39, 16, 36, 33, 13, 32, 35, 34, 6, 49, 27, 29, 40, 44], target=28
answer: