développer une expression descriptive

import java.util.*;
import java.io.*;
import java.math.*;

/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/
class Solution {

    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        String D = in.nextLine();
        for(String chunk : D.split(" "))
        {
            int nbr = Integer.parseInt(chunk.replaceAll("[^0-9]",""));
            for(int i = 0; i < nbr; i++)
                System.out.print(chunk.replaceAll("[0-9]",""));
        }

    }
}