/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* 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 s = "Hi. (sad) I've got bad news. zsad,\nHey... (sad)\nOkay. Bye. zsad,";
		System.out.println(s.replaceAll("\\(([.[^()]]+)\\)|z([.[^z,]]+),", "<<$0>>")); 
	}
}

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