There are 6 shapes on a 8x8 grid. Which shape is closest to the orange 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: orange square at (3, 5)
Distance from target shape to yellow rectangle at (7, 0): 9
Distance from target shape to cyan right_triangle at (2, 3): 3
Distance from target shape to purple rectangle at (5, 0): 7
Distance from target shape to blue rectangle at (7, 5): 4
Distance from target shape to gray trapezoid at (1, 3): 4
Closest shape is the cyan right_triangle at (2, 3) with distance 3</think>

<answer>(2, 3)</answer>