import java.util.*;
public class Main {
        public static void main(String[] args){
                Scanner sc = new Scanner(System.in);
                int n = sc.nextInt();
                String[] a = new String[n];
                for(int i = 0 ; i < n ; i++){
                        a[i] = sc.next();
                }
                sc.close();
                Arrays.sort(a);
                int yono = 1;
                for(int i = 1 ; i < n ; i++){
                        if(!a[i - 1].equals(a[i])) yono++;
                }
                System.out.println(yono);
        }
}
/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