There are 3 shapes on a 10x10 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 (4, 0)
Distance from target shape to orange square at (4, 3): 3
Distance from target shape to green trapezoid at (5, 7): 8
Closest shape is the orange square at (4, 3) with distance 3</think>

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