There are 6 shapes on a 10x10 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 (7, 4)
Distance from target shape to gray rectangle at (5, 9): 7
Distance from target shape to yellow trapezoid at (8, 6): 3
Distance from target shape to cyan square at (8, 9): 6
Distance from target shape to red rectangle at (4, 4): 3
Distance from target shape to green square at (6, 1): 4
Closest shape is the yellow trapezoid at (8, 6) with distance 3</think>

<answer>(8, 6)</answer>