There are 5 shapes on a 10x10 grid. Which shape is closest to the blue 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: blue square at (1, 4)
Distance from target shape to pink rectangle at (5, 9): 9
Distance from target shape to brown right_triangle at (1, 0): 4
Distance from target shape to purple square at (3, 1): 5
Distance from target shape to green trapezoid at (2, 5): 2
Closest shape is the green trapezoid at (2, 5) with distance 2</think>

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