There are 5 shapes on a 8x8 grid. Which shape is closest to the red 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: red square at (1, 0)
Distance from target shape to purple trapezoid at (2, 5): 6
Distance from target shape to pink square at (4, 0): 3
Distance from target shape to brown rectangle at (7, 2): 8
Distance from target shape to orange square at (1, 4): 4
Closest shape is the pink square at (4, 0) with distance 3</think>

<answer>(4, 0)</answer>