There are 4 shapes on a 8x8 grid. Which shape is closest to the yellow 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: yellow rectangle at (0, 6)
Distance from target shape to green square at (4, 1): 9
Distance from target shape to red trapezoid at (1, 4): 3
Distance from target shape to cyan square at (2, 5): 3
Closest shape is the red trapezoid at (1, 4) with distance 3</think>

<answer>(1, 4)</answer>