import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;
import java.util.List;
import java.util.Arrays;
public class Main {
    //Program start

    //Program end

    @Test
public void test1() {
    assertEquals(7, maximumXOR(Arrays.asList(3,2,4,6)));
}
@Test
public void test2() {
    assertEquals(11, maximumXOR(Arrays.asList(1,2,3,9,2)));
}

}