There are 5 shapes on a 10x10 grid. Which shape is closest to the brown right_triangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: brown right_triangle at (2, 7)
Distance from target shape to red rectangle at (8, 5): 8
Distance from target shape to green right_triangle at (5, 4): 6
Distance from target shape to yellow trapezoid at (3, 3): 5
Distance from target shape to blue square at (9, 2): 12
Closest shape is the yellow trapezoid at (3, 3) with distance 5</think>

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