import java.util.regex.*;
import java.util.*;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String s="[[Identity (philosophy)|unique identity]]";
		Matcher m = Pattern.compile("\\[{2}(.*)\\|(.*)]]").matcher(s);
		if (m.matches()) {
			System.out.println(m.group(1).replaceAll("\\W+", " ").trim().replace(" ", "_")); // // => Identity_philosphy
			System.out.println(m.group(2).trim()); // => unique identity
		}
	}
}

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