import java.util.*;
public class Freq {
  public static void main(String[] args) {
    Map<String, Integer> m = new HashMap<String, Integer>();
    // Initialize frequency table from command line
    for (String a : args) {
      Integer freq = m.get(a);
      m.put(a, (freq == null) ? 1
          : freq + 1);
    }
    System.out.println(m.size() + " distinct words:");
    System.out.println(m);
  }
}