public class WordCountTest {
   public static void main(String[] args) throws Exception {
	WordReader reader = new WordReader(new InputStreamReader(System.in));
	Map wordMap = new TreeMap();
	String word;
	while ((word=reader.readWord()) != null) {
		Integer count = wordMap.containsKey(word) ? wordMap.get(word) : 0;
		wordMap.put(word, ++count);
        }
	// Print out using the natural order of the key
	for (Map.Entry entry : wordMap.entrySet()) {
		System.out.println(entry.getKey()+" : "+entry.getValue());
	}
   }
}