There are 3 shapes on a 6x6 grid. Which shape is closest to the gray 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: gray rectangle at (1, 1)
Distance from target shape to purple trapezoid at (4, 4): 6
Distance from target shape to yellow trapezoid at (4, 1): 3
Closest shape is the yellow trapezoid at (4, 1) with distance 3</think>

<answer>(4, 1)</answer>