Problem K
I've Been Everywhere, Man

Someone recently asked her “how many different cities have you visited for work?” Thankfully Alice has kept a log of her trips. Help Alice figure out the number of cities she has visited at least once.

Input

The first line of input contains a single positive integer $T\le 50$ indicating the number of test cases. The first line of each test case also contains a single positive integer $n$ indicating the number of work trips Alice has taken so far. The following $n$ lines describe these trips. The $i$th such line simply contains the name of the city Alice visited on her $i$th trip.

Alice’s work only sends her to cities with simple names: city names only contain lowercase letters, have at least one letter, and do not contain spaces.

The number of trips is at most $100$ and no city name contains more than $20$ characters.

Output

For each test case, simply output a single line containing a single integer that is the number of distinct cities that Alice has visited on her work trips.

2
7
saskatoon
toronto
winnipeg
toronto
vancouver
saskatoon
toronto
3
edmonton
edmonton
edmonton

4
1