import java.util.List;
import java.util.Arrays;

class Main {
    
  public static void main(String[] args) {
    
    List<String> nomes = Arrays.asList("Paulo", "Ana", "Zeno", "Beno");
    String todosNomes = String.join(", ", nomes);
    
    System.out.println(todosNomes);
    
  }
  
}