There are 5 shapes on a 10x10 grid. Which shape is closest to the pink 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: pink right_triangle at (9, 4)
Distance from target shape to yellow right_triangle at (0, 1): 12
Distance from target shape to blue trapezoid at (7, 7): 5
Distance from target shape to red trapezoid at (1, 3): 9
Distance from target shape to orange square at (0, 4): 9
Closest shape is the blue trapezoid at (7, 7) with distance 5</think>

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