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# I'm guessing its a bug or something with tree house but it is telling for the "up" case up increase by 1

I'm guessing its a bug or something with tree house but it is telling for the "up" case the location property y must increase by 1, but that is what I did

robots.swift
```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!")
}
}

class Robot: Machine{

override func move(_ direction: String) {
switch direction{

case "up": location.y += 1
case "down": location.y -= 1
case "left": location.x += 1
case "right": location.x += 1

default: break

}
}

}
```

Remember that Swift is case sensitive, "Up" and "up" are not the same string. You have to capitalize all of the directions. And also fix the "Left" case where you currently add to `x` instead of decrease it.

Like this:

```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!")
}
}

class Robot: Machine{

override func move(_ direction: String) {
switch direction{

case "Up": location.y += 1
case "Down": location.y -= 1
case "Left": location.x -= 1
case "Right": location.x += 1

default: break
}
}
}
```