There are 4 shapes on a 8x8 grid. Which shape is closest to the gray 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: gray square at (2, 7)
Distance from target shape to green trapezoid at (4, 2): 7
Distance from target shape to pink rectangle at (7, 1): 11
Distance from target shape to orange right_triangle at (0, 4): 5
Closest shape is the orange right_triangle at (0, 4) with distance 5</think>

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