There are 6 shapes on a 10x10 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 (5, 5)
Distance from target shape to orange right_triangle at (7, 7): 4
Distance from target shape to cyan rectangle at (0, 7): 7
Distance from target shape to yellow trapezoid at (3, 2): 5
Distance from target shape to pink square at (3, 4): 3
Distance from target shape to red rectangle at (7, 4): 3
Closest shape is the pink square at (3, 4) with distance 3</think>

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