There are 5 shapes on a 5x5 grid. Which shape is closest to the brown square in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: brown square at (2, 4)
Distance from target shape to yellow right_triangle at (1, 2): 3
Distance from target shape to blue right_triangle at (2, 1): 3
Distance from target shape to red rectangle at (3, 0): 5
Distance from target shape to purple rectangle at (1, 0): 5
Closest shape is the yellow right_triangle at (1, 2) with distance 3</think>

<answer>(1, 2)</answer>