import java.util.ArrayList;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        HashSet<String> PrizeSet = new HashSet<>();
        int num = sc.nextInt();
        for(int i = 0;i < num;i++){
            String Prize = sc.next();
            PrizeSet.add(Prize);
        }
        System.out.println(PrizeSet.size());
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz