In ACM_DIY, there is one master called “Lost”. As we know he is a “-2Dai”, which means he has a lot of money.
  
Well, Lost use Ipad and IPhone to reward the ones who solve the following problem.
  
In this problem, we define F( n ) as :
  
Then Lost denote a function G(a,b,n,p) as

Here a, b, n, p are all positive integer!
If you could tell Lost the value of G(a,b,n,p) , then you will get one Ipad and one IPhone!

The first line is one integer T indicates the number of the test cases. (T <= 100)
Then for every case, only one line containing 4 positive integers a, b, n and p.
(1 ≤a, b, n, p≤2*10 ⁹ , p is an odd prime number and a,b < p.)

Output one line,the value of the G(a,b,n,p) .