Alice travels a lot for her work. Each time she travels,
she visits a single city before returning home.
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
$T \leq 50$ 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.
Sample Input 1 
Sample Output 1 
2
7
saskatoon
toronto
winnipeg
toronto
vancouver
saskatoon
toronto
3
edmonton
edmonton
edmonton

4
1
