/* 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[]){ 
         String str1 = "Hello! Java World"; 
 
         int index = str1.indexOf("Java");
         int size = "Java".length() ; 
 
         String str2 = str1.substring(index, index+size);
         str2 = str2.toLowerCase();
         str2 = str2.replace('a', 'A');
 
         System.out.println(str2);
    }
}

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