'''
https://programmers.co.kr/learn/courses/30/lessons/68644
๋ ๊ฐ ๋ฝ์์ ๋ํ๊ธฐ
[ํ์ด]
'''
def solution(numbers):
answer = []
size = len(numbers)
for i in range(size-1):
for j in range(i+1,size):
answer.append(numbers[i] + numbers[j])
return sorted(set(answer))
'''
'''