View Code of Problem 50

import java.util.Scanner;

public class Main 
{
	public static void main(String[] args) 
        {
          Scanner scan=new Scanner(System.in);
          String s=scan.nextLine();
          char[] c=s.toCharArray();
          boolean b=false;
          StringBuilder sb=new StringBuilder();
          for(int i=0;i<c.length;i++)
          {
            if(c[i]>=0&&c[i]<=9)
            {
              if(b==true)
                sb.append("*"+c[i]);
              else
                sb.append(c[i]);
              b=false;
            }
            else
             b=true;
          }
          if(b==true)
            sb.append("*");
          System.out.println(sb);
        }
}