import java.util.*;
public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        String s[] = new String[n];

        for(int i = 0; i < n; i++){
                s[i] = scan.next();
        }
        Arrays.sort(s);

        int ans = 1;
        for(int i = 0; i < n - 1; i++){
            if(!(s[i].equals(s[i+1]))){
                ans++;
            }
        }

        System.out.println(ans);
    }
}
/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