There are 2 shapes on a 8x8 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 (3, 0)
Distance from target shape to orange trapezoid at (1, 3): 5
Closest shape is the orange trapezoid at (1, 3) with distance 5</think>

<answer>(1, 3)</answer>