There are 5 shapes on a 4x4 grid. Which shape is closest to the blue 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: blue trapezoid at (3, 0)
Distance from target shape to orange right_triangle at (2, 1): 2
Distance from target shape to brown square at (2, 2): 3
Distance from target shape to red square at (0, 3): 6
Distance from target shape to cyan square at (0, 2): 5
Closest shape is the orange right_triangle at (2, 1) with distance 2</think>

<answer>(2, 1)</answer>