There are 5 shapes on a 8x8 grid. Which shape is closest to the cyan 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: cyan rectangle at (0, 0)
Distance from target shape to red square at (3, 7): 10
Distance from target shape to orange rectangle at (3, 4): 7
Distance from target shape to brown rectangle at (4, 1): 5
Distance from target shape to gray right_triangle at (4, 5): 9
Closest shape is the brown rectangle at (4, 1) with distance 5</think>

<answer>(4, 1)</answer>