There are 5 shapes on a 10x10 grid. Which shape is closest to the yellow 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: yellow right_triangle at (6, 9)
Distance from target shape to brown square at (3, 7): 5
Distance from target shape to cyan rectangle at (5, 2): 8
Distance from target shape to pink trapezoid at (2, 4): 9
Distance from target shape to red square at (0, 8): 7
Closest shape is the brown square at (3, 7) with distance 5</think>

<answer>(3, 7)</answer>