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

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