There are 4 shapes on a 6x6 grid. Which shape is closest to the yellow rectangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: yellow rectangle at (2, 4)
Distance from target shape to green rectangle at (4, 4): 2
Distance from target shape to orange right_triangle at (3, 3): 2
Distance from target shape to brown trapezoid at (1, 2): 3
Closest shape is the green rectangle at (4, 4) with distance 2</think>

<answer>(4, 4)</answer>