There are 5 shapes on a 8x8 grid. Which shape is closest to the cyan 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: cyan right_triangle at (7, 0)
Distance from target shape to green square at (4, 2): 5
Distance from target shape to brown right_triangle at (7, 7): 7
Distance from target shape to orange square at (0, 5): 12
Distance from target shape to yellow rectangle at (0, 4): 11
Closest shape is the green square at (4, 2) with distance 5</think>

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