/* 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 output = "regulations { qux def } standards none rules { abc-123 456-defghi wxyz_678  } security { enabled }"; 
		String subst = output.replaceFirst("(?s)^.*\\brules\\s*[{]\\s*([^{}]+)[}].*$", "$1");
		String[] res = subst.split("\\s+");
		System.out.println(Arrays.toString(res));
	}
}

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