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 = Integer.parseInt(sc.nextLine());
        HashSet<String> set = new HashSet<>();
        for (int i = 0; i < N; i ++) {
            set.add(sc.nextLine());
        }

        System.out.println(set.size());
    }
} 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 = Integer.parseInt(sc.nextLine());
        HashSet<String> set = new HashSet<>();
        for (int i = 0; i < N; i ++) {
            set.add(sc.nextLine());
        }

        System.out.println(set.size());
    }
} Main public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.nextLine());
        HashSet<String> set = new HashSet<>();
        for (int i = 0; i < N; i ++) {
            set.add(sc.nextLine());
        }

        System.out.println(set.size());
    } main {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.nextLine());
        HashSet<String> set = new HashSet<>();
        for (int i = 0; i < N; i ++) {
            set.add(sc.nextLine());
        }

        System.out.println(set.size());
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = Integer.parseInt(sc.nextLine()); N Integer.parseInt(sc.nextLine()) Integer.parseInt Integer sc.nextLine() sc.nextLine sc HashSet<String> set = new HashSet<>(); set new HashSet<>() for (int i = 0; i < N; i ++) {
            set.add(sc.nextLine());
        } int i = 0; int i = 0; i 0 i < N i N i ++ i ++ i {
            set.add(sc.nextLine());
        } {
            set.add(sc.nextLine());
        } set.add(sc.nextLine()) set.add set sc.nextLine() sc.nextLine sc System.out.println(set.size()) System.out.println System.out System System.out set.size() set.size set String args[] args public class Main {

    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.nextLine());
        HashSet<String> set = new HashSet<>();
        for (int i = 0; i < N; i ++) {
            set.add(sc.nextLine());
        }

        System.out.println(set.size());
    }
} public class Main {

    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.nextLine());
        HashSet<String> set = new HashSet<>();
        for (int i = 0; i < N; i ++) {
            set.add(sc.nextLine());
        }

        System.out.println(set.size());
    }
} 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 = Integer.parseInt(sc.nextLine());
        HashSet<String> set = new HashSet<>();
        for (int i = 0; i < N; i ++) {
            set.add(sc.nextLine());
        }

        System.out.println(set.size());
    }
}
