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