There are 3 shapes on a 8x8 grid. Which shape is closest to the gray 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: gray square at (1, 7)
Distance from target shape to red trapezoid at (7, 3): 10
Distance from target shape to pink trapezoid at (4, 1): 9
Closest shape is the pink trapezoid at (4, 1) with distance 9</think>

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