There are 5 shapes on a 9x9 grid. Which shape is closest to the blue 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: blue right_triangle at (5, 7)
Distance from target shape to cyan rectangle at (2, 6): 4
Distance from target shape to yellow rectangle at (2, 0): 10
Distance from target shape to brown trapezoid at (7, 4): 5
Distance from target shape to gray square at (6, 0): 8
Closest shape is the cyan rectangle at (2, 6) with distance 4</think>

<answer>(2, 6)</answer>