function solution(numbers) {
let answer = [];
let tmp = [];
for (let i = 0; i < numbers.length;i++){
for (let j = i+1; j < numbers.length; j++ ){
tmp.push(numbers[i]+numbers[j]);
}
}
tmp.sort((a,b) => a-b )
for(let i = 0; i < tmp.length;i++){
if(tmp[i] !== tmp[i+1]){
answer.push(tmp[i])
}
}
return answer;
}