//
// Example of using various Collection classes, and Collections class.
//
// Usage:  
//	java CharCount somestring
//
// Description:
//	Counts how many times each character in "somestring" appears.
//
// Example of use:
//	java CharCount "hello, world, how are you?"
//

import java.util.*;

public
class CharCount {

        public static void 
        main(String[] args) {
		if (args.length < 1) {
			System.out.println("Usage:  CharCount string");
			System.exit(1);
		}
		Map map = new HashMap();
		for (int i = 0 ; i < args[0].length(); ++i) {
			Character c = new Character(args[0].charAt(i));
			Object o = map.get(c);
			if (o == null)
				map.put(c, new Integer(1));
			else {
				int count = ((Integer) o).intValue();
				map.put(c, new Integer(count + 1));
			}
		}

		List chars = new ArrayList(map.keySet());
		Collections.sort(chars);
		Iterator iter = chars.iterator();
		while (iter.hasNext()) {
			Object key = iter.next();
			System.out.println(key + ":  " + map.get(key));
		}
        }
}