There are 6 shapes on a 7x7 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 (4, 2)
Distance from target shape to green rectangle at (0, 5): 7
Distance from target shape to orange right_triangle at (1, 4): 5
Distance from target shape to red rectangle at (2, 2): 2
Distance from target shape to cyan rectangle at (2, 3): 3
Distance from target shape to pink rectangle at (6, 0): 4
Closest shape is the red rectangle at (2, 2) with distance 2</think>

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