/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String line, copyLine;
        HashSet<String> words = new HashSet<>();
        while ((line = reader.readLine()) != null) {
            if (!line.isEmpty()) {
                copyLine = line.trim().replaceAll("\\s+", " ");
                for (String i : copyLine.split(" ")) {
                    words.add(i);
                }
            }
        }
        for (String j : words) {
            System.out.println(j);
        }
        System.out.println(words.size());
	}
}

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ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBhbmEKCgoKICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIGFuYQ==

                                                  ana



                                                    ana