import java.util.*;
public class Main
{
static Scanner scn =new Scanner(System.in);
public static void main(String[] args)
{
System.out.println(“Enter a string”);
String str=scn.next();
System.out.print(alphabeticallyGreater(str));
}
static String temp="";
static String answer="";
public static String alphabeticallyGreater(String str)
{
temp=str.substring(0,1);
if(str.length()<2||str==null)
{
return str;
}
else
{
if(temp.compareTo(str.substring(1,2))>1)
{
answer+=str.substring(0,1);
}
else
{
answer+=temp;
temp=str.substring(1,2);
}
alphabeticallyGreater(str.substring(0,str.length()-1));
return answer;
}
}
}