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

<answer>(7, 3)</answer>