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. \InputFile The first line contains a single positive integer $t~(t \le 50)$ 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. \OutputFile 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.