There are 3 shapes on a 8x8 grid. Which shape is closest to the green 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: green square at (0, 2)
Distance from target shape to blue trapezoid at (7, 4): 9
Distance from target shape to pink right_triangle at (6, 1): 7
Closest shape is the pink right_triangle at (6, 1) with distance 7</think>

<answer>(6, 1)</answer>