There are 3 shapes on a 4x4 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 (3, 0)
Distance from target shape to gray right_triangle at (2, 3): 4
Distance from target shape to blue square at (1, 1): 3
Closest shape is the blue square at (1, 1) with distance 3</think>

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