/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/* 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
	{
		final String regex = "^(?:[A-Z]+-)+(QX-\\d+)$";
		final String string = "MCC-QX-1081\n"
			 + "TEF-CO-QX-4949\n"
			 + "SPARE-QX-4500\n";
		final String subst = "$1";
 
		final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
		final Matcher matcher = pattern.matcher(string);
 
		final String result = matcher.replaceAll(subst);
 
		System.out.println(result);
	}
}

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