ZYB loves xor very much.Now he gets two arrays A and B.The length of A and B are both n.ZYB wants to know the xor of all $(A_i+B_j)$ $(i,j \in [1,n])$.
The xor of an array $B$ is defined as $B_1$ $xor$ $B_2$ $xor$....$xor$ $B_n$
Input
Multiple test cases, the first line contains an integer T(no more than 10), indicating the number of cases. Each test case contains three lines
In the first line there is an integer n.
In the second line there are n integers $A_1,A_2...A_n$
In the third line there are n integers $B_1,B_2...B_n$
$n \in [1,10^5]$，$A_i,B_i \in [0,2^{60}]$
The sum of all $n$ is no more than $2*10^5$
Output
For each case, the output should occupies exactly one line. The output format is Case #x: ans, here x is the data number begins at 1.
