You are given three grids, where each of them is 5 by 5 in size.
Grids have empty cells marked with "▢" and filled cells marked with "X".
You are also given a referring expression that describes one of the given grids.
Your task is to select the grid that matches the given referring expression.
Generate only the number (in text) of the grid that matches the given expression by selecting first, second, or third.

First:

X X ▢ X X
X X ▢ X X
▢ ▢ ▢ ▢ ▢
X X ▢ X X
X X ▢ X X

Second:

X X X X X
X ▢ X ▢ X
X ▢ X ▢ X
X ▢ X ▢ X
X X X X X

Third:

X X X X X
X ▢ ▢ ▢ X
X ▢ ▢ ▢ X
X ▢ ▢ ▢ X
X X X X X

Expression: The target grid has a consistent pattern of Xs and ▢s, with no empty rows or columns. It has a total of 15 filled cells (5 rows and 5 columns) and 10 empty cells (5 rows and 5 columns). The filled cells form a diamond shape, with the top and bottom rows and left and right columns having 3 filled cells each, and the middle row and middle columns having 2 filled cells each. The
Question: Which grid does the expression refer to?
Start with the tag "Answer: ", followed by your selection. Omit any other text.

Answer: Third
assistant
Answer: Third
assistant