failing to initiate the override function well

class Point {
  var x: Int
  var y: Int

  init(x: Int, y: Int) {
    self.x = x
    self.y = y
  }
}

class Machine {
  var location: Point

  init() {
    self.location = Point(x: 0, y: 0)
  }

  func move(_ direction: String) {
    print("Do nothing! I am a machine!")
  }
}

// Enter your code below
enum Direction {
    case left
    case right
    case up
    case down
}


class Robot: Machine {
    var relocation: Point

   override init() {
        self.location = Point(x: 0, y: 0)
    }

   override func moving(_ direction: Direction) {

        switch direction {
        case .up: location.y += 1
        case .down: location.y -= 1
        case .right: location.x += 1
        case .left: location.x -= 1
        default: return print(" no input")
        }
    }
}