There are 6 shapes on a 5x5 grid. Which shape is closest to the pink 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: pink square at (4, 4)
Distance from target shape to orange right_triangle at (1, 1): 6
Distance from target shape to blue trapezoid at (3, 1): 4
Distance from target shape to yellow right_triangle at (0, 0): 8
Distance from target shape to gray rectangle at (1, 4): 3
Distance from target shape to brown rectangle at (4, 1): 3
Closest shape is the gray rectangle at (1, 4) with distance 3</think>

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