There are 4 shapes on a 10x10 grid. Which shape is closest to the green 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: green rectangle at (1, 5)
Distance from target shape to yellow trapezoid at (0, 4): 2
Distance from target shape to blue rectangle at (6, 1): 9
Distance from target shape to pink square at (9, 4): 9
Closest shape is the yellow trapezoid at (0, 4) with distance 2</think>

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