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 (4, 0)
Distance from target shape to cyan right_triangle at (4, 2): 2
Closest shape is the cyan right_triangle at (4, 2) with distance 2</think>

<answer>(4, 2)</answer>