There are 6 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 (0, 3)
Distance from target shape to yellow trapezoid at (7, 0): 10
Distance from target shape to red square at (1, 3): 1
Distance from target shape to orange square at (2, 3): 2
Distance from target shape to gray square at (2, 0): 5
Distance from target shape to pink rectangle at (5, 4): 6
Closest shape is the red square at (1, 3) with distance 1</think>

<answer>(1, 3)</answer>