There are 3 shapes on a 8x8 grid. Which shape is closest to the cyan 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: cyan square at (4, 1)
Distance from target shape to red trapezoid at (2, 4): 5
Distance from target shape to blue right_triangle at (6, 7): 8
Closest shape is the red trapezoid at (2, 4) with distance 5</think>

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