type Va[A] = Validation[String, A]
  type VaNel[A] = ValidationNel[String, A]

  implicit val vaBind = new Bind[Va] {
    def map[A, B](fa: Va[A])(f: A => B): Va[B] = fa.map(f)

    def bind[A, B](fa: Va[A])(f: A => Va[B]): Va[B] =
      fa.flatMap(f)
  }

  implicit val vaNelBind = new Bind[VaNel] {
    def map[A, B](fa: VaNel[A])(f: A => B): VaNel[B] = fa.map(f)

    def bind[A, B](fa: VaNel[A])(f: A => VaNel[B]): VaNel[B] =
      fa.flatMap(f)
  }