There are 3 shapes on a 7x7 grid. Which shape is closest to the pink right_triangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: pink right_triangle at (0, 0)
Distance from target shape to blue rectangle at (3, 2): 5
Distance from target shape to yellow trapezoid at (0, 1): 1
Closest shape is the yellow trapezoid at (0, 1) with distance 1</think>

<answer>(0, 1)</answer>