import java.io.*;
import java.util.*;

public class BUILDING{
  public static void main(String[] args) throws IOException {
    FileReader file = new FileReader("BUILDING.IN");
    BufferedReader input = new BufferedReader(file);
    int numSets = (Integer.parseInt(input.readLine()));
    Vector buildings, printers;
    int numWords, j, k, times;
    String building;
    String code, tester;
    for (int h = 0; h < numSets; h++) {
      buildings = new Vector();
      printers = new Vector();
      numWords = (Integer.parseInt(input.readLine()));
      for (k = 0; k < numWords; k++) {
        building = input.readLine();
        buildings.add(building);
      }
      code = input.readLine();
      for (j = 0; j < buildings.size(); j++) {
        tester = code;
        building = (String) buildings.get(j);
        times = building.length();
        for (k = 0; k < times && tester.length()!=0; k++) {
          if (tester.substring(0, 1).equalsIgnoreCase(building.substring(0, 1))) {
            tester = tester.substring(1, tester.length());
          }
          if (tester.length() == 0) {
            printers.add(buildings.get(j));
          }
          building = building.substring(1, building.length());
        }
      }
      System.out.println("Data Set " + (h + 1) + ":");
      for (j = 0; j < printers.size(); j++) {
        System.out.println( (String) printers.get(j));
      }
    }
  }
}