There are 2 shapes on a 8x8 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 (4, 7)
Distance from target shape to yellow square at (4, 3): 4
Closest shape is the yellow square at (4, 3) with distance 4</think>

<answer>(4, 3)</answer>