import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;

public class Main {
    public static void main(String... args) throws IOException {
        int n;
        Set<String> s = new HashSet<>();
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String line;

        line = bf.readLine();

        n = Integer.parseInt(line);

        for (int i = 0; i < n; i++) {
            line = bf.readLine();
            s.add(line);
        }

        System.out.println(s.size());
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.util.HashSet; HashSet java.util import java.util.Set; Set java.util public class Main {
    public static void main(String... args) throws IOException {
        int n;
        Set<String> s = new HashSet<>();
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String line;

        line = bf.readLine();

        n = Integer.parseInt(line);

        for (int i = 0; i < n; i++) {
            line = bf.readLine();
            s.add(line);
        }

        System.out.println(s.size());
    }
} Main public static void main(String... args) throws IOException {
        int n;
        Set<String> s = new HashSet<>();
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String line;

        line = bf.readLine();

        n = Integer.parseInt(line);

        for (int i = 0; i < n; i++) {
            line = bf.readLine();
            s.add(line);
        }

        System.out.println(s.size());
    } main {
        int n;
        Set<String> s = new HashSet<>();
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String line;

        line = bf.readLine();

        n = Integer.parseInt(line);

        for (int i = 0; i < n; i++) {
            line = bf.readLine();
            s.add(line);
        }

        System.out.println(s.size());
    } int n; n Set<String> s = new HashSet<>(); s new HashSet<>() BufferedReader bf = new BufferedReader(new InputStreamReader(System.in)); bf new BufferedReader(new InputStreamReader(System.in)) String line; line line = bf.readLine() line bf.readLine() bf.readLine bf n = Integer.parseInt(line) n Integer.parseInt(line) Integer.parseInt Integer line for (int i = 0; i < n; i++) {
            line = bf.readLine();
            s.add(line);
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            line = bf.readLine();
            s.add(line);
        } {
            line = bf.readLine();
            s.add(line);
        } line = bf.readLine() line bf.readLine() bf.readLine bf s.add(line) s.add s line System.out.println(s.size()) System.out.println System.out System System.out s.size() s.size s String... args args public class Main {
    public static void main(String... args) throws IOException {
        int n;
        Set<String> s = new HashSet<>();
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String line;

        line = bf.readLine();

        n = Integer.parseInt(line);

        for (int i = 0; i < n; i++) {
            line = bf.readLine();
            s.add(line);
        }

        System.out.println(s.size());
    }
} public class Main {
    public static void main(String... args) throws IOException {
        int n;
        Set<String> s = new HashSet<>();
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String line;

        line = bf.readLine();

        n = Integer.parseInt(line);

        for (int i = 0; i < n; i++) {
            line = bf.readLine();
            s.add(line);
        }

        System.out.println(s.size());
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;

public class Main {
    public static void main(String... args) throws IOException {
        int n;
        Set<String> s = new HashSet<>();
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String line;

        line = bf.readLine();

        n = Integer.parseInt(line);

        for (int i = 0; i < n; i++) {
            line = bf.readLine();
            s.add(line);
        }

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