There are 6 shapes on a 10x10 grid. Which shape is closest to the orange 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: orange right_triangle at (2, 4)
Distance from target shape to yellow trapezoid at (5, 8): 7
Distance from target shape to cyan square at (7, 1): 8
Distance from target shape to gray square at (7, 8): 9
Distance from target shape to pink square at (3, 9): 6
Distance from target shape to green rectangle at (8, 8): 10
Closest shape is the pink square at (3, 9) with distance 6</think>

<answer>(3, 9)</answer>