There are 3 shapes on a 8x8 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, 1)
Distance from target shape to pink right_triangle at (1, 1): 1
Distance from target shape to blue trapezoid at (3, 7): 9
Closest shape is the pink right_triangle at (1, 1) with distance 1</think>

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