There are 5 shapes on a 6x6 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 (0, 3)
Distance from target shape to orange right_triangle at (1, 2): 2
Distance from target shape to pink trapezoid at (1, 1): 3
Distance from target shape to yellow rectangle at (4, 5): 6
Distance from target shape to purple trapezoid at (3, 0): 6
Closest shape is the orange right_triangle at (1, 2) with distance 2</think>

<answer>(1, 2)</answer>