There are 6 shapes on a 7x7 grid. Which shape is closest to the gray 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: gray rectangle at (0, 1)
Distance from target shape to yellow square at (2, 3): 4
Distance from target shape to purple trapezoid at (3, 3): 5
Distance from target shape to pink right_triangle at (1, 1): 1
Distance from target shape to blue square at (4, 6): 9
Distance from target shape to red trapezoid at (0, 0): 1
Closest shape is the pink right_triangle at (1, 1) with distance 1</think>

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