There are 6 shapes on a 5x5 grid. Which shape is closest to the gray 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: gray right_triangle at (3, 2)
Distance from target shape to green rectangle at (0, 0): 5
Distance from target shape to brown trapezoid at (4, 1): 2
Distance from target shape to blue right_triangle at (3, 4): 2
Distance from target shape to pink rectangle at (3, 3): 1
Distance from target shape to cyan trapezoid at (2, 3): 2
Closest shape is the pink rectangle at (3, 3) with distance 1</think>

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