There are 6 shapes on a 9x9 grid. Which shape is closest to the brown 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: brown square at (6, 1)
Distance from target shape to purple right_triangle at (5, 7): 7
Distance from target shape to orange rectangle at (1, 6): 10
Distance from target shape to cyan right_triangle at (8, 1): 2
Distance from target shape to pink right_triangle at (7, 1): 1
Distance from target shape to red right_triangle at (1, 7): 11
Closest shape is the pink right_triangle at (7, 1) with distance 1</think>

<answer>(7, 1)</answer>