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

public class blowout {
    public static void main(String args[]) {
	BufferedReader br_reader = new BufferedReader(new InputStreamReader(System.in));
	HashSet hs = new HashSet();
	int count=0;
	try {
	    while (br_reader.ready()) {
		String line = br_reader.readLine();
		//System.out.println(line.hashCode());
		if (count % 100 ==0)
		    System.out.println(count);
		hs.add(line);
		count++;
		
	    }
	} catch (IOException e) {
	    System.out.println(e);
	}
    }
}