There are 2 shapes on a 10x10 grid. Which shape is closest to the brown rectangle 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 rectangle at (4, 5)
Distance from target shape to purple right_triangle at (6, 1): 6
Closest shape is the purple right_triangle at (6, 1) with distance 6</think>

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