import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        String array[] = new String[n];
        int cnt = 0;
        int cnt2=0;

        for(int i =0; i<n;i++){
            array[i] = sc.next();
        }

        Arrays.sort(array);

        String a = array[0];
        cnt++;
        for(int i=0;i<n;i++){
        
            if(a.equals(array[i])){

            }else{
                cnt++;
            }
             a = array[i];
       }
       System.out.println(cnt);
    }
}
/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