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 X

Third:

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

Expression: The target grid has an 'X' in the top right corner and 'X's forming a diagonal strip from the top left to the bottom right, ending in the second to last row and second to last column.
Question: Which grid does the expression refer to?
Start with the tag "Answer: ", followed by your selection. Omit any other text.

Answer: First

The expression refers to the first grid because it has an 'X' in the top right corner and 'X's forming a diagonal strip from the top left to the bottom right, ending in the second to last row and second to last column.
assistant
Answer: First

The expression refers to the first grid because it has an 'X' in the top right corner and 'X's forming a diagonal strip from the top left to the bottom right, ending in the second to last row and second to last column.
assistant