import java.util.*;

public class FindDups {
    public static void main(String args[]) {

        Set<String> s = new HashSet<String>();

        for (String a : args) {

	    boolean new1 = s.add(a);
	    if (! new1) {
                System.out.println("Duplicate detected: "+a);
	    }
	}

        System.out.println(s.size()+" distinct words detected: "+s);
    }
}