import java.util.HashSet;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {



        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        HashSet t = new HashSet();
        String s;
        int ans = 0;
        for(int i=0;i<N;i++){
            s = sc.next();
            if(!t.contains(s)){
                t.add(s);
                ans ++;
            }
        }

        System.out.println(ans);

        }


    } import java.util.HashSet; HashSet java.util import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {



        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        HashSet t = new HashSet();
        String s;
        int ans = 0;
        for(int i=0;i<N;i++){
            s = sc.next();
            if(!t.contains(s)){
                t.add(s);
                ans ++;
            }
        }

        System.out.println(ans);

        }


    } Main public static void main(String[] args) {



        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        HashSet t = new HashSet();
        String s;
        int ans = 0;
        for(int i=0;i<N;i++){
            s = sc.next();
            if(!t.contains(s)){
                t.add(s);
                ans ++;
            }
        }

        System.out.println(ans);

        } main {



        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        HashSet t = new HashSet();
        String s;
        int ans = 0;
        for(int i=0;i<N;i++){
            s = sc.next();
            if(!t.contains(s)){
                t.add(s);
                ans ++;
            }
        }

        System.out.println(ans);

        } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc HashSet t = new HashSet(); t new HashSet() String s; s int ans = 0; ans 0 for(int i=0;i<N;i++){
            s = sc.next();
            if(!t.contains(s)){
                t.add(s);
                ans ++;
            }
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            s = sc.next();
            if(!t.contains(s)){
                t.add(s);
                ans ++;
            }
        } {
            s = sc.next();
            if(!t.contains(s)){
                t.add(s);
                ans ++;
            }
        } s = sc.next() s sc.next() sc.next sc if(!t.contains(s)){
                t.add(s);
                ans ++;
            } !t.contains(s) t.contains(s) t.contains t s {
                t.add(s);
                ans ++;
            } t.add(s) t.add t s ans ++ ans System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {

    public static void main(String[] args) {



        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        HashSet t = new HashSet();
        String s;
        int ans = 0;
        for(int i=0;i<N;i++){
            s = sc.next();
            if(!t.contains(s)){
                t.add(s);
                ans ++;
            }
        }

        System.out.println(ans);

        }


    } public class Main {

    public static void main(String[] args) {



        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        HashSet t = new HashSet();
        String s;
        int ans = 0;
        for(int i=0;i<N;i++){
            s = sc.next();
            if(!t.contains(s)){
                t.add(s);
                ans ++;
            }
        }

        System.out.println(ans);

        }


    } Main
import java.util.HashSet;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {



        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        HashSet t = new HashSet();
        String s;
        int ans = 0;
        for(int i=0;i<N;i++){
            s = sc.next();
            if(!t.contains(s)){
                t.add(s);
                ans ++;
            }
        }

        System.out.println(ans);

        }


    }