Array Recovery
Description
For an array of non-negative integers $a$ of size $n$, we construct another array $d$ as follows: $d_1 = a_1$, $d_i = |a_i - a_{i - 1}|$ for $2 \le i \le n$.
Your task is to restore the array $a$ from a given array $d$, or to report that there are multiple possible arrays.
The first line contains a single integer $t$ ($1 \le t \le 100$) — the number of test cases.
The first line of each test case contains one integer $n$ ($1 \le n \le 100$) — the size of the arrays $a$ and $d$.
The second line contains $n$ integers $d_1, d_2, \dots, d_n$ ($0 \le d_i \le 100$) — the elements of the array $d$.
It can be shown that there always exists at least one suitable array $a$ under these constraints.
For each test case, print the elements of the array $a$, if there is only one possible array $a$. Otherwise, print $-1$.
Input
The first line contains a single integer $t$ ($1 \le t \le 100$) — the number of test cases.
The first line of each test case contains one integer $n$ ($1 \le n \le 100$) — the size of the arrays $a$ and $d$.
The second line contains $n$ integers $d_1, d_2, \dots, d_n$ ($0 \le d_i \le 100$) — the elements of the array $d$.
It can be shown that there always exists at least one suitable array $a$ under these constraints.
Output
For each test case, print the elements of the array $a$, if there is only one possible array $a$. Otherwise, print $-1$.
3
4
1 0 2 5
3
2 6 3
5
0 0 0 0 0
1 1 3 8
-1
0 0 0 0 0
Note
In the second example, there are two suitable arrays: $[2, 8, 5]$ and $[2, 8, 11]$.
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