There are 5 shapes on a 8x8 grid. Which shape is closest to the green right_triangle 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 right_triangle at (0, 5)
Distance from target shape to orange trapezoid at (6, 0): 11
Distance from target shape to brown square at (2, 5): 2
Distance from target shape to pink rectangle at (1, 4): 2
Distance from target shape to cyan rectangle at (2, 6): 3
Closest shape is the brown square at (2, 5) with distance 2</think>

<answer>(2, 5)</answer>