There are 6 shapes on a 9x9 grid. Which shape is closest to the red square in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: red square at (2, 6)
Distance from target shape to purple square at (1, 6): 1
Distance from target shape to brown right_triangle at (1, 7): 2
Distance from target shape to green trapezoid at (8, 1): 11
Distance from target shape to cyan right_triangle at (6, 1): 9
Distance from target shape to orange right_triangle at (8, 0): 12
Closest shape is the purple square at (1, 6) with distance 1</think>

<answer>(1, 6)</answer>