String

Given 3 strings A, B, C, find the longest string D which satisfy the following rules:
a) D is the subsequence of A
b) D is the subsequence of B
c) C is the substring of D
Substring here means a consecutive subsequnce.
You need to output the length of D.

The first line of the input contains an integer T(T = 20) which means the number of test cases.
For each test case, the first line only contains string A, the second line only contains string B, and the third only contains string C.
The length of each string will not exceed 1000, and string C should always be the subsequence of string A and string B.
All the letters in each string are in lowercase.

For each test case, output Case #a: b. Here a means the number of case, and b means the length of D.

2
aaaaa
aaaa
aa
abcdef
acebdf
cf

Case #1: 4
Case #2: 3

For test one, D is "aaaa", and for test two, D is "acf".

2013 Multi-University Training Contest 8