
Score : 300 points
Problem StatementYou drew lottery N times. In the i-th draw, you got an item of the kind represented by a string S_i.
How many kinds of items did you get?
Constraints
1 \leq N \leq 2\times 10^5
S_i consists of lowercase English letters and has a length between 1 and 10 (inclusive).
InputInput is given from Standard Input in the following format:
N
S_1
:
S_N
OutputPrint the number of kinds of items you got.
Sample Input 13
apple
orange
apple
Sample Output 12
You got two kinds of items: apple and orange.
Sample Input 25
grape
grape
grape
grape
grape
Sample Output 21
Sample Input 34
aaaa
a
aaa
aa
Sample Output 34
