There are 3 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 purple trapezoid at (2, 7): 4
Distance from target shape to brown right_triangle at (8, 0): 11
Closest shape is the purple trapezoid at (2, 7) with distance 4</think>

<answer>(2, 7)</answer>