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 X ▢ ▢ ▢
X ▢ ▢ ▢ ▢

Distractor grid 1:

▢ ▢ ▢ ▢ 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 4 filled columns on the left
assistant
Expression: The top row of the grid has five filled cells, the second row has four filled cells and the third row has three filled cells, while the fourth and fifth rows have two and one filled cell respectively, with filled cells also along the leftmost column.

This description distinguishes the target grid from distractor grid 1, which has a different arrangement of filled cells, and distractor grid 2, which has a gap in the filled cells along the leftmost column
assistant