There are 4 shapes on a 10x10 grid. Which shape is closest to the pink 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: pink trapezoid at (4, 9)
Distance from target shape to cyan square at (9, 1): 13
Distance from target shape to yellow rectangle at (3, 1): 9
Distance from target shape to green right_triangle at (6, 2): 9
Closest shape is the yellow rectangle at (3, 1) with distance 9</think>

<answer>(3, 1)</answer>