/* 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 Sample1 = "((something)(world)(example))";
	Pattern regex = Pattern.compile("\\(?\\((.*?)\\)\\)?");
	Matcher regexMatcher = regex.matcher(Sample1);
	while (regexMatcher.find()) {
		System.out.print(regexMatcher.group(1));
	} 
}
}

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