import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String s = "Только [1] что [id123456789|Артем Волков] продал проект [id987654321|Денису Мирному]";
		Pattern pattern = Pattern.compile("\\[[^\\]\\[|]*\\|([^\\]\\[]*)]");
		Matcher matcher = pattern.matcher(s);
		while (matcher.find()){
			System.out.println(s);
			System.out.println(matcher.group(0));
			System.out.println(matcher.group(1));
		} 
	}
}

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