There are 6 shapes on a 7x7 grid. Which shape is closest to the purple trapezoid in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: purple trapezoid at (5, 4)
Distance from target shape to pink right_triangle at (2, 3): 4
Distance from target shape to red rectangle at (3, 1): 5
Distance from target shape to brown square at (3, 3): 3
Distance from target shape to gray square at (4, 4): 1
Distance from target shape to orange rectangle at (2, 6): 5
Closest shape is the gray square at (4, 4) with distance 1</think>

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