1891：Trades

       This is a very easy problem.

      ACMeow loves GTX1920. Now he has m RMB, but no GTX1920s. In the next n days, the unit price of GTX1920 in the ith day is C_i RMB. In other words, in the ith day, he can buy one GTX1920 with C_i RMB, or sell one GTX1920 to gain C_i RMB. He can buy or sell as many times as he wants in one day, but make sure that he has enough money for buying or enough GTX1920 for selling.

      Now he wants to know, how many RMB can he get after the n days. Could you please help him?

      It’s really easy, yeah?

First line contains an integer T(1 ≤ T ≤ 20), represents there are T test cases.

For each test case: first line contains two integers n(1 ≤ n ≤ 2000) and m(0 ≤ m ≤ 1000000000). Following n integers in one line, the ith integer represents C_i(1 ≤ C_i ≤ 1000000000). 

For each test case, output "Case #X: Y" in a line (without quotes), where X is the case number starting from 1, and Y is the maximum number of RMB he can get mod 1000000007. 

2

3 1

1 2 3

4 1

1 2 1 2

Case #1: 3

Case #2: 4