There are 5 shapes on a 7x7 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 (4, 5)
Distance from target shape to pink rectangle at (6, 3): 4
Distance from target shape to orange trapezoid at (1, 2): 6
Distance from target shape to brown trapezoid at (0, 0): 9
Distance from target shape to red right_triangle at (2, 4): 3
Closest shape is the red right_triangle at (2, 4) with distance 3</think>

<answer>(2, 4)</answer>