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

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

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

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

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

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

}
