import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[]args) {
        try {
        
         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());

      HashSet<String> lottery = new HashSet<String>();
      for(int i = 0;i<n;i++) {
          String words = br.readLine();
          lottery.add(words);
      }
System.out.println(lottery.size());

        }catch(Exception e) {
        }
    }

    
} import java.io.*; io.* java import java.util.*; util.* java public class Main {
    public static void main(String[]args) {
        try {
        
         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());

      HashSet<String> lottery = new HashSet<String>();
      for(int i = 0;i<n;i++) {
          String words = br.readLine();
          lottery.add(words);
      }
System.out.println(lottery.size());

        }catch(Exception e) {
        }
    }

    
} Main public static void main(String[]args) {
        try {
        
         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());

      HashSet<String> lottery = new HashSet<String>();
      for(int i = 0;i<n;i++) {
          String words = br.readLine();
          lottery.add(words);
      }
System.out.println(lottery.size());

        }catch(Exception e) {
        }
    } main {
        try {
        
         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());

      HashSet<String> lottery = new HashSet<String>();
      for(int i = 0;i<n;i++) {
          String words = br.readLine();
          lottery.add(words);
      }
System.out.println(lottery.size());

        }catch(Exception e) {
        }
    } try {
        
         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());

      HashSet<String> lottery = new HashSet<String>();
      for(int i = 0;i<n;i++) {
          String words = br.readLine();
          lottery.add(words);
      }
System.out.println(lottery.size());

        }catch(Exception e) {
        } catch(Exception e) {
        } Exception e {
        } {
        
         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());

      HashSet<String> lottery = new HashSet<String>();
      for(int i = 0;i<n;i++) {
          String words = br.readLine();
          lottery.add(words);
      }
System.out.println(lottery.size());

        } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int n = Integer.parseInt(br.readLine()); n Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br HashSet<String> lottery = new HashSet<String>(); lottery new HashSet<String>() for(int i = 0;i<n;i++) {
          String words = br.readLine();
          lottery.add(words);
      } int i = 0; int i = 0; i 0 i<n i n i++ i++ i {
          String words = br.readLine();
          lottery.add(words);
      } {
          String words = br.readLine();
          lottery.add(words);
      } String words = br.readLine(); words br.readLine() br.readLine br lottery.add(words) lottery.add lottery words System.out.println(lottery.size()) System.out.println System.out System System.out lottery.size() lottery.size lottery String[]args args public class Main {
    public static void main(String[]args) {
        try {
        
         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());

      HashSet<String> lottery = new HashSet<String>();
      for(int i = 0;i<n;i++) {
          String words = br.readLine();
          lottery.add(words);
      }
System.out.println(lottery.size());

        }catch(Exception e) {
        }
    }

    
} public class Main {
    public static void main(String[]args) {
        try {
        
         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());

      HashSet<String> lottery = new HashSet<String>();
      for(int i = 0;i<n;i++) {
          String words = br.readLine();
          lottery.add(words);
      }
System.out.println(lottery.size());

        }catch(Exception e) {
        }
    }

    
} Main
import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[]args) {
        try {
        
         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());

      HashSet<String> lottery = new HashSet<String>();
      for(int i = 0;i<n;i++) {
          String words = br.readLine();
          lottery.add(words);
      }
System.out.println(lottery.size());

        }catch(Exception e) {
        }
    }

    
}