There are 5 shapes on a 7x7 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 (0, 5)
Distance from target shape to yellow right_triangle at (5, 6): 6
Distance from target shape to pink right_triangle at (2, 3): 4
Distance from target shape to brown rectangle at (0, 4): 1
Distance from target shape to blue trapezoid at (0, 1): 4
Closest shape is the brown rectangle at (0, 4) with distance 1</think>

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