Melissa, in front of you is an open paddock, within it you can put two of the following three items:

1. Grass
2. Shrubs
3. Tree's

Now, for the two of those you choose, each one must have a height, which must be one of the following for each:

1. Short
2. Medium
3. Tall

So, what two items do you see in your empty paddock and how high are each please?