5668：Circle

$\ \ \ \ $Satiya August is in charge of souls.

$\ \ \ \ $He finds $n$ souls,and lets them become a circle.He ordered them to play Joseph Games.The souls will count off from the soul $1$.The soul who is numbered $k$ will be taken out,and will not join in the game again.

$\ \ \ \ $Now Satiya August has got the sequence in the Out Ordered,and ask you the smallest $k$.If you cannot give him a correct answer,he will kill you!

$\ \ \ \ $The first line has a number T,means testcase number.

$\ \ \ \ $Each test,first line has a number $n$.

$\ \ \ \ $The second line has $n$ numbers,which are the sequence in the Out Ordered**(The person who is out at $ai_{th}$ round was numbered $i$)**.

$\ \ \ \ $The sequence input must be a permutation from $1$ to $n$.

$\ \ \ \ 1\le T \le 10,2 \le n \le 20$.

$\ \ \ \ $For each case,If there is a eligible number $k$,output the smallest $k$,otherwise,output”Creation August is a SB!”.