/* 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
	{
		String original = "World";
        char[] chars = original.toCharArray();
        Character[] charObjectArray = ArrayUtils.toObject(chars);
 
		Arrays.sort(charObjectArray, new Comparator<Character>() {
		    public int compare(Character o1, Character o2) {
		        return Character.toLowerCase(o1) - Character.toLowerCase(o2);
		    }
		});
		String sorted = new String(chars);
        System.out.println(sorted);
	}
}

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