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".
Your task is to generate a referring expression that best describes the target grid while distinguishing it from the two other distractor grids.
The first grid is the target grid, and the following two grids are the distractors.

Target grid:

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

Distractor grid 1:

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

Distractor grid 2:

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

Instruction: Describe the target grid.
Generate the referring expression starting with the tag "Expression: " for the given target grid. Omit any other text.
Expression: The grid with a single row of three X's and two rows of two X's and one X.
assistant
Expression: Grid with two rows and three columns of empty cells, a row of filled cells at the bottom, and a row of filled cells in the second and third columns of the third row.
assistant