There are 6 shapes on a 8x8 grid. Which shape is closest to the yellow 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: yellow right_triangle at (6, 0)
Distance from target shape to cyan square at (7, 2): 3
Distance from target shape to purple square at (0, 5): 11
Distance from target shape to orange right_triangle at (0, 7): 13
Distance from target shape to red square at (5, 7): 8
Distance from target shape to blue rectangle at (2, 2): 6
Closest shape is the cyan square at (7, 2) with distance 3</think>

<answer>(7, 2)</answer>