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(6, distinctNames(Arrays.asList("coffee","donuts","time","toffee")));
}
@Test
public void test2() {
    assertEquals(0, distinctNames(Arrays.asList("lack","back")));
}

}