
import java.util.*;
public class Main{
 public static void main(String[] args) {
   Scanner kbd = new Scanner(System.in);
   int n=kbd.nextInt();
   String[] A= new String[n];
   for(int i=0;i<n;i++){
     A[i]=kbd.next();
}
int x=1;
Arrays.sort(A);
for(int i=0;i<n-1;i++){
if(!(A[i].equals(A[i+1]))){
  x=x+1;
}
}
System.out.println(x);
}
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz