There are 6 shapes on a 5x5 grid. Which shape is closest to the red rectangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: red rectangle at (4, 1)
Distance from target shape to blue trapezoid at (2, 4): 5
Distance from target shape to green right_triangle at (0, 2): 5
Distance from target shape to purple trapezoid at (0, 1): 4
Distance from target shape to gray right_triangle at (1, 0): 4
Distance from target shape to brown square at (4, 4): 3
Closest shape is the brown square at (4, 4) with distance 3</think>

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